25268691 has 16 divisors (see below), whose sum is σ = 38790144. Its totient is φ = 14332224.

The previous prime is 25268641. The next prime is 25268693. The reversal of 25268691 is 19686252.

It is not a de Polignac number, because 25268691 - 2¹⁵ = 25235923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25268693) 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 15 ways as a sum of consecutive naturals, for example, 1515 + ... + 7268.

It is an arithmetic number, because the mean of its divisors is an integer number (2424384).

Almost surely, 2^25268691 is an apocalyptic number.

25268691 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25268691 is a deficient number, since it is larger than the sum of its proper divisors (13521453).

25268691 is a wasteful number, since it uses less digits than its factorization.

25268691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8930.

The product of its digits is 51840, while the sum is 39.

The square root of 25268691 is about 5026.7972905221. The cubic root of 25268691 is about 293.4455861985.

The spelling of 25268691 in words is "twenty-five million, two hundred sixty-eight thousand, six hundred ninety-one".