12700631 has 4 divisors (see below), whose sum is σ = 12714912. Its totient is φ = 12686352.

The previous prime is 12700591. The next prime is 12700643. The reversal of 12700631 is 13600721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13600721 = 151 ⋅90071.

It is a cyclic number.

It is not a de Polignac number, because 12700631 - 2¹⁰ = 12699607 is a prime.

It is a super-2 number, since 2×12700631² = 322612055596322, 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 (12700661) 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, 5711 + ... + 7616.

It is an arithmetic number, because the mean of its divisors is an integer number (3178728).

Almost surely, 2^12700631 is an apocalyptic number.

12700631 is a deficient number, since it is larger than the sum of its proper divisors (14281).

12700631 is an equidigital number, since it uses as much as digits as its factorization.

12700631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14280.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 12700631 is about 3563.7944665763. The cubic root of 12700631 is about 233.3145193447.

It can be divided in two parts, 12700 and 631, that added together give a palindrome (13331).

The spelling of 12700631 in words is "twelve million, seven hundred thousand, six hundred thirty-one".