131530842 has 24 divisors (see below), whose sum is σ = 290362644. Its totient is φ = 43016064.

The previous prime is 131530831. The next prime is 131530843. The reversal of 131530842 is 248035131.

It is a happy number.

131530842 is a `hidden beast` number, since 1 + 315 + 308 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 123010281 + 8520561 = 11091^2 + 2919^2 .

It is not an unprimeable number, because it can be changed into a prime (131530843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67983 + ... + 69890.

Almost surely, 2^131530842 is an apocalyptic number.

131530842 is an abundant number, since it is smaller than the sum of its proper divisors (158831802).

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

131530842 is a wasteful number, since it uses less digits than its factorization.

131530842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137934 (or 137931 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 131530842 is about 11468.6896374433. The cubic root of 131530842 is about 508.5603922900.

Adding to 131530842 its reverse (248035131), we get a palindrome (379565973).

The spelling of 131530842 in words is "one hundred thirty-one million, five hundred thirty thousand, eight hundred forty-two".