131243961 has 16 divisors (see below), whose sum is σ = 186240384. Its totient is φ = 81924864.

The previous prime is 131243941. The next prime is 131244011. The reversal of 131243961 is 169342131.

It is not a de Polignac number, because 131243961 - 2⁵ = 131243929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131243941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3516 + ... + 16578.

It is an arithmetic number, because the mean of its divisors is an integer number (11640024).

Almost surely, 2^131243961 is an apocalyptic number.

It is an amenable number.

131243961 is a deficient number, since it is larger than the sum of its proper divisors (54996423).

131243961 is a wasteful number, since it uses less digits than its factorization.

131243961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13280.

The product of its digits is 3888, while the sum is 30.

The square root of 131243961 is about 11456.1756707900. The cubic root of 131243961 is about 508.1903839798.

The spelling of 131243961 in words is "one hundred thirty-one million, two hundred forty-three thousand, nine hundred sixty-one".