25618487 has 4 divisors (see below), whose sum is σ = 25685760. Its totient is φ = 25551216.

The previous prime is 25618477. The next prime is 25618499. The reversal of 25618487 is 78481652.

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

It is a cyclic number.

It is not a de Polignac number, because 25618487 - 2⁶ = 25618423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25618427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33062 + ... + 33827.

It is an arithmetic number, because the mean of its divisors is an integer number (6421440).

Almost surely, 2^25618487 is an apocalyptic number.

25618487 is a deficient number, since it is larger than the sum of its proper divisors (67273).

25618487 is an equidigital number, since it uses as much as digits as its factorization.

25618487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67272.

The product of its digits is 107520, while the sum is 41.

The square root of 25618487 is about 5061.4708336609. The cubic root of 25618487 is about 294.7934472897.

The spelling of 25618487 in words is "twenty-five million, six hundred eighteen thousand, four hundred eighty-seven".