25021872 has 100 divisors (see below), whose sum is σ = 74269800. Its totient is φ = 8128512.

The previous prime is 25021859. The next prime is 25021877. The reversal of 25021872 is 27812052.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (25021877) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55504 + ... + 55952.

It is an arithmetic number, because the mean of its divisors is an integer number (742698).

Almost surely, 2^25021872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25021872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37134900).

25021872 is an abundant number, since it is smaller than the sum of its proper divisors (49247928).

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

25021872 is a wasteful number, since it uses less digits than its factorization.

25021872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 25021872 is about 5002.1867218248. The cubic root of 25021872 is about 292.4870211204.

It can be divided in two parts, 250 and 21872, that added together give a palindrome (22122).

The spelling of 25021872 in words is "twenty-five million, twenty-one thousand, eight hundred seventy-two".