12691761 has 8 divisors (see below), whose sum is σ = 17090304. Its totient is φ = 8377200.

The previous prime is 12691733. The next prime is 12691769. The reversal of 12691761 is 16719621.

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

It is not a de Polignac number, because 12691761 - 2⁶ = 12691697 is a prime.

It is a super-2 number, since 2×12691761² = 322161594562242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12691769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20641 + ... + 21246.

It is an arithmetic number, because the mean of its divisors is an integer number (2136288).

Almost surely, 2^12691761 is an apocalyptic number.

It is an amenable number.

12691761 is a deficient number, since it is larger than the sum of its proper divisors (4398543).

12691761 is a wasteful number, since it uses less digits than its factorization.

12691761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41991.

The product of its digits is 4536, while the sum is 33.

The square root of 12691761 is about 3562.5497891258. The cubic root of 12691761 is about 233.2601918144.

The spelling of 12691761 in words is "twelve million, six hundred ninety-one thousand, seven hundred sixty-one".