25259864 has 16 divisors (see below), whose sum is σ = 54128400. Its totient is φ = 10825632.

The previous prime is 25259851. The next prime is 25259869. The reversal of 25259864 is 46895252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25259869) 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, 225479 + ... + 225590.

It is an arithmetic number, because the mean of its divisors is an integer number (3383025).

Almost surely, 2^25259864 is an apocalyptic number.

It is an amenable number.

25259864 is an abundant number, since it is smaller than the sum of its proper divisors (28868536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25259864 is a wasteful number, since it uses less digits than its factorization.

25259864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451082 (or 451078 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 25259864 is about 5025.9192194065. The cubic root of 25259864 is about 293.4114128697.

The spelling of 25259864 in words is "twenty-five million, two hundred fifty-nine thousand, eight hundred sixty-four".