25972887 has 4 divisors (see below), whose sum is σ = 34630520. Its totient is φ = 17315256.

The previous prime is 25972873. The next prime is 25972907. The reversal of 25972887 is 78827952.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25972887 - 2⁷ = 25972759 is a prime.

It is a super-2 number, since 2×25972887² = 1349181718229538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25971887) 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, 4328812 + ... + 4328817.

It is an arithmetic number, because the mean of its divisors is an integer number (8657630).

Almost surely, 2^25972887 is an apocalyptic number.

25972887 is a deficient number, since it is larger than the sum of its proper divisors (8657633).

25972887 is an equidigital number, since it uses as much as digits as its factorization.

25972887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8657632.

The product of its digits is 564480, while the sum is 48.

The square root of 25972887 is about 5096.3601717304. The cubic root of 25972887 is about 296.1465939019.

The spelling of 25972887 in words is "twenty-five million, nine hundred seventy-two thousand, eight hundred eighty-seven".