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12542166 = 23271321931
BaseRepresentation
bin101111110110…
…000011010110
3212121012121200
4233312003112
511202322131
61124453330
7211415040
oct57660326
925535550
1012542166
11709712a
12424a246
1327a1a00
141946a90
15117b2e6
hexbf60d6

12542166 has 144 divisors (see below), whose sum is σ = 36541440. Its totient is φ = 3032640.

The previous prime is 12542143. The next prime is 12542177. The reversal of 12542166 is 66124521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 404571 + ... + 404601.

It is an arithmetic number, because the mean of its divisors is an integer number (253760).

Almost surely, 212542166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12542166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18270720).

12542166 is an abundant number, since it is smaller than the sum of its proper divisors (23999274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12542166 is a wasteful number, since it uses less digits than its factorization.

12542166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 75 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12542166 is about 3541.4920584409. The cubic root of 12542166 is about 232.3401051161.

Adding to 12542166 its reverse (66124521), we get a palindrome (78666687).

The spelling of 12542166 in words is "twelve million, five hundred forty-two thousand, one hundred sixty-six".

Divisors: 1 2 3 6 7 9 13 14 18 19 21 26 31 38 39 42 57 62 63 78 91 93 114 117 126 133 169 171 182 186 217 234 247 266 273 279 338 342 399 403 434 494 507 546 558 589 651 741 798 806 819 1014 1178 1183 1197 1209 1302 1482 1521 1638 1729 1767 1953 2223 2366 2394 2418 2821 3042 3211 3458 3534 3549 3627 3906 4123 4446 5187 5239 5301 5642 6422 7098 7254 7657 8246 8463 9633 10374 10478 10602 10647 12369 15314 15561 15717 16926 19266 21294 22477 22971 24738 25389 28899 31122 31434 36673 37107 44954 45942 47151 50778 53599 57798 67431 68913 73346 74214 94302 99541 107198 110019 134862 137826 160797 199082 202293 220038 298623 321594 330057 404586 482391 597246 660114 696787 895869 964782 1393574 1791738 2090361 4180722 6271083 12542166