25281264 has 80 divisors (see below), whose sum is σ = 67852800. Its totient is φ = 8107008.

The previous prime is 25281257. The next prime is 25281271. The reversal of 25281264 is 46218252.

It is an interprime number because it is at equal distance from previous prime (25281257) and next prime (25281271).

Its product of digits (7680) is a multiple of the sum of its prime divisors (256).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223672 + ... + 223784.

It is an arithmetic number, because the mean of its divisors is an integer number (848160).

Almost surely, 2^25281264 is an apocalyptic number.

25281264 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 25281264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33926400).

25281264 is an abundant number, since it is smaller than the sum of its proper divisors (42571536).

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

25281264 is a wasteful number, since it uses less digits than its factorization.

25281264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 256 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 25281264 is about 5028.0477324703. The cubic root of 25281264 is about 293.4942482575.

The spelling of 25281264 in words is "twenty-five million, two hundred eighty-one thousand, two hundred sixty-four".