131297257 has 8 divisors (see below), whose sum is σ = 161596736. Its totient is φ = 103883472.

The previous prime is 131297251. The next prime is 131297261. The reversal of 131297257 is 752792131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131297257 - 2³ = 131297249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131297251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721323 + ... + 721504.

It is an arithmetic number, because the mean of its divisors is an integer number (20199592).

Almost surely, 2^131297257 is an apocalyptic number.

It is an amenable number.

131297257 is a deficient number, since it is larger than the sum of its proper divisors (30299479).

131297257 is a wasteful number, since it uses less digits than its factorization.

131297257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442847.

The product of its digits is 26460, while the sum is 37.

The square root of 131297257 is about 11458.5015163415. The cubic root of 131297257 is about 508.2591639047.

The spelling of 131297257 in words is "one hundred thirty-one million, two hundred ninety-seven thousand, two hundred fifty-seven".