25872017 has 4 divisors (see below), whose sum is σ = 25883760. Its totient is φ = 25860276.

The previous prime is 25871999. The next prime is 25872019. The reversal of 25872017 is 71027852.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25872017 - 2²² = 21677713 is a prime.

It is a super-2 number, since 2×25872017² = 1338722527296578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25872019) 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, 1463 + ... + 7340.

It is an arithmetic number, because the mean of its divisors is an integer number (6470940).

Almost surely, 2^25872017 is an apocalyptic number.

It is an amenable number.

25872017 is a deficient number, since it is larger than the sum of its proper divisors (11743).

25872017 is an equidigital number, since it uses as much as digits as its factorization.

25872017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11742.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 25872017 is about 5086.4542659892. The cubic root of 25872017 is about 295.7627184407.

Adding to 25872017 its reverse (71027852), we get a palindrome (96899869).

The spelling of 25872017 in words is "twenty-five million, eight hundred seventy-two thousand, seventeen".