131245761 has 16 divisors (see below), whose sum is σ = 182882304. Its totient is φ = 83640144.

The previous prime is 131245757. The next prime is 131245769. The reversal of 131245761 is 167542131.

131245761 is nontrivially palindromic in base 9.

It is not a de Polignac number, because 131245761 - 2² = 131245757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131245769) 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, 4761 + ... + 16886.

It is an arithmetic number, because the mean of its divisors is an integer number (11430144).

Almost surely, 2^131245761 is an apocalyptic number.

It is an amenable number.

131245761 is a deficient number, since it is larger than the sum of its proper divisors (51636543).

131245761 is a wasteful number, since it uses less digits than its factorization.

131245761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21740.

The product of its digits is 5040, while the sum is 30.

The square root of 131245761 is about 11456.2542307684. The cubic root of 131245761 is about 508.1927072321.

Adding to 131245761 its reverse (167542131), we get a palindrome (298787892).

The spelling of 131245761 in words is "one hundred thirty-one million, two hundred forty-five thousand, seven hundred sixty-one".