25425420 has 48 divisors (see below), whose sum is σ = 74941440. Its totient is φ = 6422976.

The previous prime is 25425403. The next prime is 25425451. The reversal of 25425420 is 2452452.

It is a happy number.

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, 10012 + ... + 12291.

It is an arithmetic number, because the mean of its divisors is an integer number (1561280).

Almost surely, 2^25425420 is an apocalyptic number.

25425420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25425420 is an abundant number, since it is smaller than the sum of its proper divisors (49516020).

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

25425420 is a wasteful number, since it uses less digits than its factorization.

25425420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22334 (or 22332 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 25425420 is about 5042.3625415077. The cubic root of 25425420 is about 294.0510346872.

Adding to 25425420 its reverse (2452452), we get a palindrome (27877872).

The spelling of 25425420 in words is "twenty-five million, four hundred twenty-five thousand, four hundred twenty".