104256517 has 4 divisors (see below), whose sum is σ = 104278240. Its totient is φ = 104234796.

The previous prime is 104256511. The next prime is 104256521. The reversal of 104256517 is 715652401.

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, and also an emirpimes, since its reverse is a distinct semiprime: 715652401 = 29 ⋅24677669.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104256517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104256511) 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, 123 + ... + 14440.

It is an arithmetic number, because the mean of its divisors is an integer number (26069560).

Almost surely, 2^104256517 is an apocalyptic number.

It is an amenable number.

104256517 is a deficient number, since it is larger than the sum of its proper divisors (21723).

104256517 is an equidigital number, since it uses as much as digits as its factorization.

104256517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21722.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 104256517 is about 10210.6080622067. The cubic root of 104256517 is about 470.6532594036.

The spelling of 104256517 in words is "one hundred four million, two hundred fifty-six thousand, five hundred seventeen".