12732731 has 16 divisors (see below), whose sum is σ = 14757120. Its totient is φ = 10871520.

The previous prime is 12732721. The next prime is 12732737. The reversal of 12732731 is 13723721.

It is not a de Polignac number, because 12732731 - 2¹⁰ = 12731707 is a prime.

It is a super-2 number, since 2×12732731² = 324244877436722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12732731.

It is not an unprimeable number, because it can be changed into a prime (12732737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14501 + ... + 15353.

It is an arithmetic number, because the mean of its divisors is an integer number (922320).

Almost surely, 2^12732731 is an apocalyptic number.

12732731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12732731 is a deficient number, since it is larger than the sum of its proper divisors (2024389).

12732731 is a wasteful number, since it uses less digits than its factorization.

12732731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its digits is 1764, while the sum is 26.

The square root of 12732731 is about 3568.2952512369. The cubic root of 12732731 is about 233.5109162866.

It can be divided in two parts, 1273 and 2731, that added together give a palindrome (4004).

The spelling of 12732731 in words is "twelve million, seven hundred thirty-two thousand, seven hundred thirty-one".