131397072 has 20 divisors (see below), whose sum is σ = 339442560. Its totient is φ = 43799008.

The previous prime is 131397059. The next prime is 131397107. The reversal of 131397072 is 270793131.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368672 + ... + 1368767.

It is an arithmetic number, because the mean of its divisors is an integer number (16972128).

Almost surely, 2^131397072 is an apocalyptic number.

131397072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131397072 is an abundant number, since it is smaller than the sum of its proper divisors (208045488).

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

131397072 is a wasteful number, since it uses less digits than its factorization.

131397072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737450 (or 2737444 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 131397072 is about 11462.8561885771. The cubic root of 131397072 is about 508.3879277982.

The spelling of 131397072 in words is "one hundred thirty-one million, three hundred ninety-seven thousand, seventy-two".