131172872 has 32 divisors (see below), whose sum is σ = 249314520. Its totient is φ = 64696320.

The previous prime is 131172859. The next prime is 131172893. The reversal of 131172872 is 278271131.

It can be written as a sum of positive squares in 4 ways, for example, as 102292996 + 28879876 = 10114^2 + 5374^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227048 + ... + 227624.

Almost surely, 2^131172872 is an apocalyptic number.

It is an amenable number.

131172872 is a deficient number, since it is larger than the sum of its proper divisors (118141648).

131172872 is a wasteful number, since it uses less digits than its factorization.

131172872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 917 counting only the distinct ones).

The product of its digits is 4704, while the sum is 32.

The square root of 131172872 is about 11453.0726008351. The cubic root of 131172872 is about 508.0986127200.

The spelling of 131172872 in words is "one hundred thirty-one million, one hundred seventy-two thousand, eight hundred seventy-two".