131272421 has 12 divisors (see below), whose sum is σ = 156258432. Its totient is φ = 109900728.

The previous prime is 131272409. The next prime is 131272451. The reversal of 131272421 is 124272131.

It is not a de Polignac number, because 131272421 - 2²² = 127078117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131272451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29045 + ... + 33258.

It is an arithmetic number, because the mean of its divisors is an integer number (13021536).

Almost surely, 2^131272421 is an apocalyptic number.

It is an amenable number.

131272421 is a deficient number, since it is larger than the sum of its proper divisors (24986011).

131272421 is an equidigital number, since it uses as much as digits as its factorization.

131272421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62360 (or 62353 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 131272421 is about 11457.4177282667. The cubic root of 131272421 is about 508.2271146934.

The spelling of 131272421 in words is "one hundred thirty-one million, two hundred seventy-two thousand, four hundred twenty-one".