131257386 has 24 divisors (see below), whose sum is σ = 306267780. Its totient is φ = 40386816.

The previous prime is 131257369. The next prime is 131257397. The reversal of 131257386 is 683752131.

131257386 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 573 + 86 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 130988025 + 269361 = 11445^2 + 519^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131257386.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280231 + ... + 280698.

Almost surely, 2^131257386 is an apocalyptic number.

131257386 is an abundant number, since it is smaller than the sum of its proper divisors (175010394).

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

131257386 is a wasteful number, since it uses less digits than its factorization.

131257386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560950 (or 560947 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 131257386 is about 11456.7615843222. The cubic root of 131257386 is about 508.2077110584.

The spelling of 131257386 in words is "one hundred thirty-one million, two hundred fifty-seven thousand, three hundred eighty-six".