131442387 has 16 divisors (see below), whose sum is σ = 182307840. Its totient is φ = 84146400.

The previous prime is 131442349. The next prime is 131442427. The reversal of 131442387 is 783244131.

It is not a de Polignac number, because 131442387 - 2⁸ = 131442131 is a prime.

It is a super-2 number, since 2×131442387² = 34554202200515538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131447387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6789 + ... + 17577.

It is an arithmetic number, because the mean of its divisors is an integer number (11394240).

Almost surely, 2^131442387 is an apocalyptic number.

131442387 is a deficient number, since it is larger than the sum of its proper divisors (50865453).

131442387 is a wasteful number, since it uses less digits than its factorization.

131442387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10954.

The product of its digits is 16128, while the sum is 33.

The square root of 131442387 is about 11464.8326197987. The cubic root of 131442387 is about 508.4463637810.

The spelling of 131442387 in words is "one hundred thirty-one million, four hundred forty-two thousand, three hundred eighty-seven".