131231242 has 16 divisors (see below), whose sum is σ = 202011264. Its totient is φ = 63900000.

The previous prime is 131231237. The next prime is 131231257. The reversal of 131231242 is 242132131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60517 + ... + 62647.

It is an arithmetic number, because the mean of its divisors is an integer number (12625704).

Almost surely, 2^131231242 is an apocalyptic number.

131231242 is a deficient number, since it is larger than the sum of its proper divisors (70780022).

131231242 is a wasteful number, since it uses less digits than its factorization.

131231242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925.

The product of its digits is 288, while the sum is 19.

The square root of 131231242 is about 11455.6205418999. The cubic root of 131231242 is about 508.1739670154.

Adding to 131231242 its reverse (242132131), we get a palindrome (373363373).

It can be divided in two parts, 13123 and 1242, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 131231242 in words is "one hundred thirty-one million, two hundred thirty-one thousand, two hundred forty-two".