25455140 has 24 divisors (see below), whose sum is σ = 54700800. Its totient is φ = 9944928.

The previous prime is 25455121. The next prime is 25455151. The reversal of 25455140 is 4155452.

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, 13940 + ... + 15659.

It is an arithmetic number, because the mean of its divisors is an integer number (2279200).

Almost surely, 2^25455140 is an apocalyptic number.

25455140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25455140 is an abundant number, since it is smaller than the sum of its proper divisors (29245660).

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

25455140 is a wasteful number, since it uses less digits than its factorization.

25455140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29651 (or 29649 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 25455140 is about 5045.3087120611. The cubic root of 25455140 is about 294.1655630326.

The spelling of 25455140 in words is "twenty-five million, four hundred fifty-five thousand, one hundred forty".