25641017 has 8 divisors (see below), whose sum is σ = 26619840. Its totient is φ = 24668560.

The previous prime is 25640983. The next prime is 25641047. The reversal of 25641017 is 71014652.

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

It is not a de Polignac number, because 25641017 - 2²⁴ = 8863801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25641047) 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, 7598 + ... + 10440.

It is an arithmetic number, because the mean of its divisors is an integer number (3327480).

Almost surely, 2^25641017 is an apocalyptic number.

It is an amenable number.

25641017 is a deficient number, since it is larger than the sum of its proper divisors (978823).

25641017 is a wasteful number, since it uses less digits than its factorization.

25641017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 25641017 is about 5063.6959821853. The cubic root of 25641017 is about 294.8798399836.

Adding to 25641017 its reverse (71014652), we get a palindrome (96655669).

The spelling of 25641017 in words is "twenty-five million, six hundred forty-one thousand, seventeen".