102560257 has 4 divisors (see below), whose sum is σ = 103239616. Its totient is φ = 101880900.

The previous prime is 102560209. The next prime is 102560261. The reversal of 102560257 is 752065201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102560257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102560207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339453 + ... + 339754.

It is an arithmetic number, because the mean of its divisors is an integer number (25809904).

Almost surely, 2^102560257 is an apocalyptic number.

It is an amenable number.

102560257 is a deficient number, since it is larger than the sum of its proper divisors (679359).

102560257 is an equidigital number, since it uses as much as digits as its factorization.

102560257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679358.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 102560257 is about 10127.2038095419. The cubic root of 102560257 is about 468.0867704429.

The spelling of 102560257 in words is "one hundred two million, five hundred sixty thousand, two hundred fifty-seven".