131236457 has 8 divisors (see below), whose sum is σ = 144080832. Its totient is φ = 118544400.

The previous prime is 131236453. The next prime is 131236487. The reversal of 131236457 is 754632131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131236457 - 2² = 131236453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131236453) 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 7 ways as a sum of consecutive naturals, for example, 36269 + ... + 39722.

It is an arithmetic number, because the mean of its divisors is an integer number (18010104).

Almost surely, 2^131236457 is an apocalyptic number.

It is an amenable number.

131236457 is a deficient number, since it is larger than the sum of its proper divisors (12844375).

131236457 is a wasteful number, since it uses less digits than its factorization.

131236457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76159.

The product of its digits is 15120, while the sum is 32.

The square root of 131236457 is about 11455.8481571641. The cubic root of 131236457 is about 508.1806983702.

Adding to 131236457 its reverse (754632131), we get a palindrome (885868588).

The spelling of 131236457 in words is "one hundred thirty-one million, two hundred thirty-six thousand, four hundred fifty-seven".