25116391 has 12 divisors (see below), whose sum is σ = 26632480. Its totient is φ = 23680800.

The previous prime is 25116383. The next prime is 25116401. The reversal of 25116391 is 19361152.

25116391 = 569² + 570² + ... + 637².

It is not a de Polignac number, because 25116391 - 2³ = 25116383 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25116331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41491 + ... + 42091.

Almost surely, 2^25116391 is an apocalyptic number.

25116391 is a deficient number, since it is larger than the sum of its proper divisors (1516089).

25116391 is an equidigital number, since it uses as much as digits as its factorization.

25116391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 703 counting only the distinct ones).

The product of its digits is 1620, while the sum is 28.

The square root of 25116391 is about 5011.6255845783. The cubic root of 25116391 is about 292.8548439014.

The spelling of 25116391 in words is "twenty-five million, one hundred sixteen thousand, three hundred ninety-one".