131942561 has 8 divisors (see below), whose sum is σ = 133864320. Its totient is φ = 130027248.

The previous prime is 131942549. The next prime is 131942567. The reversal of 131942561 is 165249131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131942561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131942567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52250 + ... + 54716.

It is an arithmetic number, because the mean of its divisors is an integer number (16733040).

Almost surely, 2^131942561 is an apocalyptic number.

It is an amenable number.

131942561 is a deficient number, since it is larger than the sum of its proper divisors (1921759).

131942561 is an equidigital number, since it uses as much as digits as its factorization.

131942561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223.

The product of its digits is 6480, while the sum is 32.

The square root of 131942561 is about 11486.6253094632. The cubic root of 131942561 is about 509.0904729926.

The spelling of 131942561 in words is "one hundred thirty-one million, nine hundred forty-two thousand, five hundred sixty-one".