12500731 has 6 divisors (see below), whose sum is σ = 12774620. Its totient is φ = 12232596.

The previous prime is 12500693. The next prime is 12500749. The reversal of 12500731 is 13700521.

12500731 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12500731 - 2⁷ = 12500603 is a prime.

It is a super-2 number, since 2×12500731² = 312536551068722, 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 = 12500699 and 12500708.

It is not an unprimeable number, because it can be changed into a prime (12500231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 621 + ... + 5038.

Almost surely, 2^12500731 is an apocalyptic number.

12500731 is a deficient number, since it is larger than the sum of its proper divisors (273889).

12500731 is an frugal number, since it uses more digits than its factorization.

12500731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5753 (or 5706 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 12500731 is about 3535.6372834328. The cubic root of 12500731 is about 232.0839655944.

Subtracting from 12500731 its product of nonzero digits (210), we obtain a palindrome (12500521).

It can be divided in two parts, 12500 and 731, that added together give a palindrome (13231).

The spelling of 12500731 in words is "twelve million, five hundred thousand, seven hundred thirty-one".