12691760 has 20 divisors (see below), whose sum is σ = 29508528. Its totient is φ = 5076672.

The previous prime is 12691733. The next prime is 12691769. The reversal of 12691760 is 6719621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×12691760² = 322161543795200, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 79244 + ... + 79403.

Almost surely, 2^12691760 is an apocalyptic number.

12691760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12691760 is an abundant number, since it is smaller than the sum of its proper divisors (16816768).

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

12691760 is a wasteful number, since it uses less digits than its factorization.

12691760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158660 (or 158654 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 12691760 is about 3562.5496487768. The cubic root of 12691760 is about 233.2601856881.

The spelling of 12691760 in words is "twelve million, six hundred ninety-one thousand, seven hundred sixty".