25494887 has 12 divisors (see below), whose sum is σ = 28601496. Its totient is φ = 22537440.

The previous prime is 25494877. The next prime is 25494899. The reversal of 25494887 is 78849452.

It is a happy number.

It is not a de Polignac number, because 25494887 - 2²² = 21300583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25494817) 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 11 ways as a sum of consecutive naturals, for example, 14213 + ... + 15905.

It is an arithmetic number, because the mean of its divisors is an integer number (2383458).

Almost surely, 2^25494887 is an apocalyptic number.

25494887 is a deficient number, since it is larger than the sum of its proper divisors (3106609).

25494887 is a wasteful number, since it uses less digits than its factorization.

25494887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778 (or 1741 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 25494887 is about 5049.2461813621. The cubic root of 25494887 is about 294.3185919598.

The spelling of 25494887 in words is "twenty-five million, four hundred ninety-four thousand, eight hundred eighty-seven".