102256657 has 4 divisors (see below), whose sum is σ = 102317796. Its totient is φ = 102195520.

The previous prime is 102256621. The next prime is 102256681. The reversal of 102256657 is 756652201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76895361 + 25361296 = 8769^2 + 5036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102256657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102256457) 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, 27988 + ... + 31429.

It is an arithmetic number, because the mean of its divisors is an integer number (25579449).

Almost surely, 2^102256657 is an apocalyptic number.

It is an amenable number.

102256657 is a deficient number, since it is larger than the sum of its proper divisors (61139).

102256657 is an equidigital number, since it uses as much as digits as its factorization.

102256657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61138.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 102256657 is about 10112.2033701859. The cubic root of 102256657 is about 467.6244354051.

The spelling of 102256657 in words is "one hundred two million, two hundred fifty-six thousand, six hundred fifty-seven".