25478487 has 12 divisors (see below), whose sum is σ = 38739480. Its totient is φ = 16091568.

The previous prime is 25478483. The next prime is 25478491. The reversal of 25478487 is 78487452.

It is an interprime number because it is at equal distance from previous prime (25478483) and next prime (25478491).

It is not a de Polignac number, because 25478487 - 2² = 25478483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25478483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74328 + ... + 74669.

It is an arithmetic number, because the mean of its divisors is an integer number (3228290).

Almost surely, 2^25478487 is an apocalyptic number.

25478487 is a deficient number, since it is larger than the sum of its proper divisors (13260993).

25478487 is a wasteful number, since it uses less digits than its factorization.

25478487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149022 (or 149019 counting only the distinct ones).

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

The square root of 25478487 is about 5047.6219153181. The cubic root of 25478487 is about 294.2554700189.

The spelling of 25478487 in words is "twenty-five million, four hundred seventy-eight thousand, four hundred eighty-seven".