12900631 has 4 divisors (see below), whose sum is σ = 13461552. Its totient is φ = 12339712.

The previous prime is 12900623. The next prime is 12900661. The reversal of 12900631 is 13600921.

12900631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12900631 - 2³ = 12900623 is a prime.

It is a super-2 number, since 2×12900631² = 332852560396322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12900661) 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, 280426 + ... + 280471.

It is an arithmetic number, because the mean of its divisors is an integer number (3365388).

Almost surely, 2^12900631 is an apocalyptic number.

12900631 is a deficient number, since it is larger than the sum of its proper divisors (560921).

12900631 is an equidigital number, since it uses as much as digits as its factorization.

12900631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560920.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 12900631 is about 3591.7448406032. The cubic root of 12900631 is about 234.5328337996.

It can be divided in two parts, 12900 and 631, that added together give a palindrome (13531).

The spelling of 12900631 in words is "twelve million, nine hundred thousand, six hundred thirty-one".