12531965 has 8 divisors (see below), whose sum is σ = 15102720. Its totient is φ = 9982672.

The previous prime is 12531919. The next prime is 12531977. The reversal of 12531965 is 56913521.

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

It is a cyclic number.

It is not a de Polignac number, because 12531965 - 2⁸ = 12531709 is a prime.

It is a super-2 number, since 2×12531965² = 314100293522450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4049 + ... + 6438.

It is an arithmetic number, because the mean of its divisors is an integer number (1887840).

Almost surely, 2^12531965 is an apocalyptic number.

It is an amenable number.

12531965 is a deficient number, since it is larger than the sum of its proper divisors (2570755).

12531965 is a wasteful number, since it uses less digits than its factorization.

12531965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10731.

The product of its digits is 8100, while the sum is 32.

The square root of 12531965 is about 3540.0515532969. The cubic root of 12531965 is about 232.2770978103.

The spelling of 12531965 in words is "twelve million, five hundred thirty-one thousand, nine hundred sixty-five".