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12520169 is a prime number
BaseRepresentation
bin101111110000…
…101011101001
3212120002102222
4233300223221
511201121134
61124203425
7211263644
oct57605351
925502388
1012520169
117081652
124239575
1327949ac
14193ca5b
151174a2e
hexbf0ae9

12520169 has 2 divisors, whose sum is σ = 12520170. Its totient is φ = 12520168.

The previous prime is 12520163. The next prime is 12520201. The reversal of 12520169 is 96102521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12166144 + 354025 = 3488^2 + 595^2 .

It is an emirp because it is prime and its reverse (96102521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12520169 - 212 = 12516073 is a prime.

It is a super-2 number, since 2×125201692 = 313509263577122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12520163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260084 + 6260085.

It is an arithmetic number, because the mean of its divisors is an integer number (6260085).

Almost surely, 212520169 is an apocalyptic number.

It is an amenable number.

12520169 is a deficient number, since it is larger than the sum of its proper divisors (1).

12520169 is an equidigital number, since it uses as much as digits as its factorization.

12520169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 12520169 is about 3538.3850836222. The cubic root of 12520169 is about 232.2041962136.

The spelling of 12520169 in words is "twelve million, five hundred twenty thousand, one hundred sixty-nine".