131259257 has 4 divisors (see below), whose sum is σ = 131315556. Its totient is φ = 131202960.

The previous prime is 131259253. The next prime is 131259259. The reversal of 131259257 is 752952131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122855056 + 8404201 = 11084^2 + 2899^2 .

It is a cyclic number.

It is not a de Polignac number, because 131259257 - 2² = 131259253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131259253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24494 + ... + 29367.

It is an arithmetic number, because the mean of its divisors is an integer number (32828889).

Almost surely, 2^131259257 is an apocalyptic number.

It is an amenable number.

131259257 is a deficient number, since it is larger than the sum of its proper divisors (56299).

131259257 is an equidigital number, since it uses as much as digits as its factorization.

131259257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56298.

The product of its digits is 18900, while the sum is 35.

The square root of 131259257 is about 11456.8432388682. The cubic root of 131259257 is about 508.2101257851.

The spelling of 131259257 in words is "one hundred thirty-one million, two hundred fifty-nine thousand, two hundred fifty-seven".