12739231 has 4 divisors (see below), whose sum is σ = 12865464. Its totient is φ = 12613000.

The previous prime is 12739229. The next prime is 12739247. The reversal of 12739231 is 13293721.

12739231 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 12739231 - 2¹ = 12739229 is a prime.

It is a super-2 number, since 2×12739231² = 324576012942722, 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 12739231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739271) 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, 62965 + ... + 63166.

It is an arithmetic number, because the mean of its divisors is an integer number (3216366).

Almost surely, 2^12739231 is an apocalyptic number.

12739231 is a deficient number, since it is larger than the sum of its proper divisors (126233).

12739231 is a wasteful number, since it uses less digits than its factorization.

12739231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126232.

The product of its digits is 2268, while the sum is 28.

The square root of 12739231 is about 3569.2059340979. The cubic root of 12739231 is about 233.5506449395.

The spelling of 12739231 in words is "twelve million, seven hundred thirty-nine thousand, two hundred thirty-one".