25132491 has 16 divisors (see below), whose sum is σ = 38853120. Its totient is φ = 16026120.

The previous prime is 25132489. The next prime is 25132493. The reversal of 25132491 is 19423152.

25132491 is a `hidden beast` number, since 251 + 324 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (25132489) and next prime (25132493).

It is not a de Polignac number, because 25132491 - 2¹ = 25132489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (25132493) 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 15 ways as a sum of consecutive naturals, for example, 19615 + ... + 20856.

It is an arithmetic number, because the mean of its divisors is an integer number (2428320).

Almost surely, 2^25132491 is an apocalyptic number.

25132491 is a deficient number, since it is larger than the sum of its proper divisors (13720629).

25132491 is a wasteful number, since it uses less digits than its factorization.

25132491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40503 (or 40497 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 25132491 is about 5013.2315924960. The cubic root of 25132491 is about 292.9174053829.

The spelling of 25132491 in words is "twenty-five million, one hundred thirty-two thousand, four hundred ninety-one".