25478847 has 16 divisors (see below), whose sum is σ = 38280960. Its totient is φ = 16745400.

The previous prime is 25478821. The next prime is 25478857. The reversal of 25478847 is 74887452.

It is not a de Polignac number, because 25478847 - 2¹¹ = 25476799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25478857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4729 + ... + 8562.

It is an arithmetic number, because the mean of its divisors is an integer number (2392560).

Almost surely, 2^25478847 is an apocalyptic number.

25478847 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

25478847 is a deficient number, since it is larger than the sum of its proper divisors (12802113).

25478847 is a wasteful number, since it uses less digits than its factorization.

25478847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13371 (or 13365 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 25478847 is about 5047.6575755493. The cubic root of 25478847 is about 294.2568559132.

The spelling of 25478847 in words is "twenty-five million, four hundred seventy-eight thousand, eight hundred forty-seven".