12691580 has 24 divisors (see below), whose sum is σ = 29075760. Its totient is φ = 4615040.

The previous prime is 12691541. The next prime is 12691583. The reversal of 12691580 is 8519621.

It is a super-2 number, since 2×12691580² = 322152405792800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12691583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28625 + ... + 29064.

It is an arithmetic number, because the mean of its divisors is an integer number (1211490).

Almost surely, 2^12691580 is an apocalyptic number.

12691580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12691580 is an abundant number, since it is smaller than the sum of its proper divisors (16384180).

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

12691580 is a wasteful number, since it uses less digits than its factorization.

12691580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57709 (or 57707 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 12691580 is about 3562.5243858814. The cubic root of 12691580 is about 233.2590829508.

The spelling of 12691580 in words is "twelve million, six hundred ninety-one thousand, five hundred eighty".