131256140 has 48 divisors (see below), whose sum is σ = 281898624. Its totient is φ = 51321600.

The previous prime is 131256127. The next prime is 131256163. The reversal of 131256140 is 41652131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330422 + ... + 330818.

It is an arithmetic number, because the mean of its divisors is an integer number (5872888).

Almost surely, 2^131256140 is an apocalyptic number.

131256140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131256140 is an abundant number, since it is smaller than the sum of its proper divisors (150642484).

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

131256140 is a wasteful number, since it uses less digits than its factorization.

131256140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 131256140 is about 11456.7072058249. The cubic root of 131256140 is about 508.2061029488.

The spelling of 131256140 in words is "one hundred thirty-one million, two hundred fifty-six thousand, one hundred forty".