131242757 has 2 divisors, whose sum is σ = 131242758. Its totient is φ = 131242756.

The previous prime is 131242739. The next prime is 131242759. The reversal of 131242757 is 757242131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118504996 + 12737761 = 10886^2 + 3569^2 .

It is a cyclic number.

It is not a de Polignac number, because 131242757 - 2¹² = 131238661 is a prime.

It is a super-2 number, since 2×131242757² = 34449322529922098, which contains 22 as substring.

Together with 131242759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131242759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65621378 + 65621379.

It is an arithmetic number, because the mean of its divisors is an integer number (65621379).

Almost surely, 2^131242757 is an apocalyptic number.

It is an amenable number.

131242757 is a deficient number, since it is larger than the sum of its proper divisors (1).

131242757 is an equidigital number, since it uses as much as digits as its factorization.

131242757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 131242757 is about 11456.1231225926. The cubic root of 131242757 is about 508.1888299703.

Adding to 131242757 its reverse (757242131), we get a palindrome (888484888).

The spelling of 131242757 in words is "one hundred thirty-one million, two hundred forty-two thousand, seven hundred fifty-seven".