25291284 has 12 divisors (see below), whose sum is σ = 59013024. Its totient is φ = 8430424.

The previous prime is 25291249. The next prime is 25291289. The reversal of 25291284 is 48219252.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25291289) 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, 1053792 + ... + 1053815.

It is an arithmetic number, because the mean of its divisors is an integer number (4917752).

Almost surely, 2^25291284 is an apocalyptic number.

It is an amenable number.

25291284 is an abundant number, since it is smaller than the sum of its proper divisors (33721740).

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

25291284 is a wasteful number, since it uses less digits than its factorization.

25291284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107614 (or 2107612 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 25291284 is about 5029.0440443488. The cubic root of 25291284 is about 293.5330177316.

The spelling of 25291284 in words is "twenty-five million, two hundred ninety-one thousand, two hundred eighty-four".