25245864 has 128 divisors (see below), whose sum is σ = 81792000. Its totient is φ = 7065792.

The previous prime is 25245823. The next prime is 25245893. The reversal of 25245864 is 46854252.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89067 + ... + 89349.

It is an arithmetic number, because the mean of its divisors is an integer number (639000).

Almost surely, 2^25245864 is an apocalyptic number.

25245864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25245864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40896000).

25245864 is an abundant number, since it is smaller than the sum of its proper divisors (56546136).

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

25245864 is a wasteful number, since it uses less digits than its factorization.

25245864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 354 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 25245864 is about 5024.5262463241. The cubic root of 25245864 is about 293.3571961762.

The spelling of 25245864 in words is "twenty-five million, two hundred forty-five thousand, eight hundred sixty-four".