131405268 has 24 divisors (see below), whose sum is σ = 310308768. Its totient is φ = 43273696.

The previous prime is 131405251. The next prime is 131405297. The reversal of 131405268 is 862504131.

It is a congruent 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, 64971 + ... + 66962.

It is an arithmetic number, because the mean of its divisors is an integer number (12929532).

Almost surely, 2^131405268 is an apocalyptic number.

It is an amenable number.

131405268 is an abundant number, since it is smaller than the sum of its proper divisors (178903500).

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

131405268 is a wasteful number, since it uses less digits than its factorization.

131405268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132023 (or 132021 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 131405268 is about 11463.2136855247. The cubic root of 131405268 is about 508.3984979496.

Adding to 131405268 its reverse (862504131), we get a palindrome (993909399).

The spelling of 131405268 in words is "one hundred thirty-one million, four hundred five thousand, two hundred sixty-eight".