25421140 has 48 divisors (see below), whose sum is σ = 55246464. Its totient is φ = 9820800.

The previous prime is 25421129. The next prime is 25421161. The reversal of 25421140 is 4112452.

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, 81585 + ... + 81895.

It is an arithmetic number, because the mean of its divisors is an integer number (1150968).

Almost surely, 2^25421140 is an apocalyptic number.

25421140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25421140 is an abundant number, since it is smaller than the sum of its proper divisors (29825324).

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

25421140 is a wasteful number, since it uses less digits than its factorization.

25421140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 25421140 is about 5041.9381194140. The cubic root of 25421140 is about 294.0345340217.

Adding to 25421140 its reverse (4112452), we get a palindrome (29533592).

The spelling of 25421140 in words is "twenty-five million, four hundred twenty-one thousand, one hundred forty".