25479287 has 4 divisors (see below), whose sum is σ = 25648176. Its totient is φ = 25310400.

The previous prime is 25479283. The next prime is 25479299. The reversal of 25479287 is 78297452.

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 25479287 - 2² = 25479283 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 (25479283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84218 + ... + 84519.

It is an arithmetic number, because the mean of its divisors is an integer number (6412044).

Almost surely, 2^25479287 is an apocalyptic number.

25479287 is a deficient number, since it is larger than the sum of its proper divisors (168889).

25479287 is a wasteful number, since it uses less digits than its factorization.

25479287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168888.

The product of its digits is 282240, while the sum is 44.

The square root of 25479287 is about 5047.7011599341. The cubic root of 25479287 is about 294.2585497663.

The spelling of 25479287 in words is "twenty-five million, four hundred seventy-nine thousand, two hundred eighty-seven".