131961261 has 8 divisors (see below), whose sum is σ = 176275744. Its totient is φ = 87810480.

The previous prime is 131961233. The next prime is 131961301. The reversal of 131961261 is 162169131.

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

It is not a de Polignac number, because 131961261 - 2⁶ = 131961197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131961211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39031 + ... + 42276.

It is an arithmetic number, because the mean of its divisors is an integer number (22034468).

Almost surely, 2^131961261 is an apocalyptic number.

It is an amenable number.

131961261 is a deficient number, since it is larger than the sum of its proper divisors (44314483).

131961261 is an equidigital number, since it uses as much as digits as its factorization.

131961261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81851.

The product of its digits is 1944, while the sum is 30.

The square root of 131961261 is about 11487.4392707862. The cubic root of 131961261 is about 509.1145227055.

The spelling of 131961261 in words is "one hundred thirty-one million, nine hundred sixty-one thousand, two hundred sixty-one".