131440457 has 2 divisors, whose sum is σ = 131440458. Its totient is φ = 131440456.

The previous prime is 131440433. The next prime is 131440471. The reversal of 131440457 is 754044131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131423296 + 17161 = 11464^2 + 131^2 .

It is a cyclic number.

It is not a de Polignac number, because 131440457 - 2²⁶ = 64331593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131440427) 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 as a sum of consecutive naturals, namely, 65720228 + 65720229.

It is an arithmetic number, because the mean of its divisors is an integer number (65720229).

Almost surely, 2^131440457 is an apocalyptic number.

It is an amenable number.

131440457 is a deficient number, since it is larger than the sum of its proper divisors (1).

131440457 is an equidigital number, since it uses as much as digits as its factorization.

131440457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 131440457 is about 11464.7484490502. The cubic root of 131440457 is about 508.4438752223.

Adding to 131440457 its reverse (754044131), we get a palindrome (885484588).

The spelling of 131440457 in words is "one hundred thirty-one million, four hundred forty thousand, four hundred fifty-seven".