12965431 has 4 divisors (see below), whose sum is σ = 13111200. Its totient is φ = 12819664.

The previous prime is 12965423. The next prime is 12965461. The reversal of 12965431 is 13456921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12965431 - 2³ = 12965423 is a prime.

It is a super-2 number, since 2×12965431² = 336204802031522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12965393 and 12965402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12965461) 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, 72751 + ... + 72928.

It is an arithmetic number, because the mean of its divisors is an integer number (3277800).

Almost surely, 2^12965431 is an apocalyptic number.

12965431 is a deficient number, since it is larger than the sum of its proper divisors (145769).

12965431 is an equidigital number, since it uses as much as digits as its factorization.

12965431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145768.

The product of its digits is 6480, while the sum is 31.

The square root of 12965431 is about 3600.7542265475. The cubic root of 12965431 is about 234.9248650703.

The spelling of 12965431 in words is "twelve million, nine hundred sixty-five thousand, four hundred thirty-one".