25021240 has 32 divisors (see below), whose sum is σ = 58747680. Its totient is φ = 9572992.

The previous prime is 25021231. The next prime is 25021267. The reversal of 25021240 is 4212052.

It is a super-2 number, since 2×25021240² = 1252124902275200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12679 + ... + 14518.

It is an arithmetic number, because the mean of its divisors is an integer number (1835865).

Almost surely, 2^25021240 is an apocalyptic number.

25021240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25021240 is an abundant number, since it is smaller than the sum of its proper divisors (33726440).

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

25021240 is a wasteful number, since it uses less digits than its factorization.

25021240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27231 (or 27227 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 25021240 is about 5002.1235490539. The cubic root of 25021240 is about 292.4845585634.

Adding to 25021240 its reverse (4212052), we get a palindrome (29233292).

The spelling of 25021240 in words is "twenty-five million, twenty-one thousand, two hundred forty".