131241157 has 4 divisors (see below), whose sum is σ = 133089696. Its totient is φ = 129392620.

The previous prime is 131241127. The next prime is 131241179. The reversal of 131241157 is 751142131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131241157 - 2⁷ = 131241029 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 (131241107) 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, 924163 + ... + 924304.

It is an arithmetic number, because the mean of its divisors is an integer number (33272424).

Almost surely, 2^131241157 is an apocalyptic number.

It is an amenable number.

131241157 is a deficient number, since it is larger than the sum of its proper divisors (1848539).

131241157 is an equidigital number, since it uses as much as digits as its factorization.

131241157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848538.

The product of its digits is 840, while the sum is 25.

The square root of 131241157 is about 11456.0532907280. The cubic root of 131241157 is about 508.1867648267.

Adding to 131241157 its reverse (751142131), we get a palindrome (882383288).

The spelling of 131241157 in words is "one hundred thirty-one million, two hundred forty-one thousand, one hundred fifty-seven".