136875257 has 2 divisors, whose sum is σ = 136875258. Its totient is φ = 136875256.

The previous prime is 136875251. The next prime is 136875281. The reversal of 136875257 is 752578631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111915241 + 24960016 = 10579^2 + 4996^2 .

It is a cyclic number.

It is not a de Polignac number, because 136875257 - 2⁴ = 136875241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136875251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68437628 + 68437629.

It is an arithmetic number, because the mean of its divisors is an integer number (68437629).

Almost surely, 2^136875257 is an apocalyptic number.

It is an amenable number.

136875257 is a deficient number, since it is larger than the sum of its proper divisors (1).

136875257 is an equidigital number, since it uses as much as digits as its factorization.

136875257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 44.

The square root of 136875257 is about 11699.3699403002. The cubic root of 136875257 is about 515.3571619908.

The spelling of 136875257 in words is "one hundred thirty-six million, eight hundred seventy-five thousand, two hundred fifty-seven".