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12161906 = 259103067
BaseRepresentation
bin101110011001…
…001101110010
3211212212222222
4232121031302
511103140111
61112401042
7205242311
oct56311562
924785888
1012161906
116957469
1240a6182
13269a8c3
141888278
1511037db
hexb99372

12161906 has 8 divisors (see below), whose sum is σ = 18552240. Its totient is φ = 5977828.

The previous prime is 12161899. The next prime is 12161911. The reversal of 12161906 is 60916121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51416 + ... + 51651.

It is an arithmetic number, because the mean of its divisors is an integer number (2319030).

Almost surely, 212161906 is an apocalyptic number.

12161906 is a deficient number, since it is larger than the sum of its proper divisors (6390334).

12161906 is a wasteful number, since it uses less digits than its factorization.

12161906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103128.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12161906 is about 3487.3924356172. The cubic root of 12161906 is about 229.9678972207.

The spelling of 12161906 in words is "twelve million, one hundred sixty-one thousand, nine hundred six".

Divisors: 1 2 59 118 103067 206134 6080953 12161906