12731292 has 72 divisors (see below), whose sum is σ = 38729600. Its totient is φ = 3444768.

The previous prime is 12731281. The next prime is 12731339. The reversal of 12731292 is 29213721.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3459 + ... + 6117.

Almost surely, 2^12731292 is an apocalyptic number.

12731292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12731292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19364800).

12731292 is an abundant number, since it is smaller than the sum of its proper divisors (25998308).

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

12731292 is a wasteful number, since it uses less digits than its factorization.

12731292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695 (or 2690 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12731292 is about 3568.0936086375. The cubic root of 12731292 is about 233.5021191462.

The spelling of 12731292 in words is "twelve million, seven hundred thirty-one thousand, two hundred ninety-two".