25256617 has 8 divisors (see below), whose sum is σ = 25823232. Its totient is φ = 24696000.

The previous prime is 25256597. The next prime is 25256633. The reversal of 25256617 is 71665252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25256617 is a prime.

It is a super-3 number, since 3×25256617³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25256677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7617 + ... + 10417.

It is an arithmetic number, because the mean of its divisors is an integer number (3227904).

Almost surely, 2^25256617 is an apocalyptic number.

It is an amenable number.

25256617 is a deficient number, since it is larger than the sum of its proper divisors (566615).

25256617 is a wasteful number, since it uses less digits than its factorization.

25256617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999.

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

The square root of 25256617 is about 5025.5961835388. The cubic root of 25256617 is about 293.3988402540.

The spelling of 25256617 in words is "twenty-five million, two hundred fifty-six thousand, six hundred seventeen".