12731394 has 16 divisors (see below), whose sum is σ = 27421632. Its totient is φ = 3917328.

The previous prime is 12731363. The next prime is 12731399. The reversal of 12731394 is 49313721.

It is not an unprimeable number, because it can be changed into a prime (12731399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81534 + ... + 81689.

It is an arithmetic number, because the mean of its divisors is an integer number (1713852).

Almost surely, 2^12731394 is an apocalyptic number.

12731394 is an abundant number, since it is smaller than the sum of its proper divisors (14690238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12731394 is a wasteful number, since it uses less digits than its factorization.

12731394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163241.

The product of its digits is 4536, while the sum is 30.

The square root of 12731394 is about 3568.1079019559. The cubic root of 12731394 is about 233.5027427318.

The spelling of 12731394 in words is "twelve million, seven hundred thirty-one thousand, three hundred ninety-four".