25421740 has 12 divisors (see below), whose sum is σ = 53385696. Its totient is φ = 10168688.

The previous prime is 25421731. The next prime is 25421741. The reversal of 25421740 is 4712452.

It is not an unprimeable number, because it can be changed into a prime (25421741) 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, 635524 + ... + 635563.

It is an arithmetic number, because the mean of its divisors is an integer number (4448808).

Almost surely, 2^25421740 is an apocalyptic number.

25421740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25421740 is an abundant number, since it is smaller than the sum of its proper divisors (27963956).

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

25421740 is a wasteful number, since it uses less digits than its factorization.

25421740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271096 (or 1271094 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 25421740 is about 5041.9976199915. The cubic root of 25421740 is about 294.0368473107.

The spelling of 25421740 in words is "twenty-five million, four hundred twenty-one thousand, seven hundred forty".