25271920 has 20 divisors (see below), whose sum is σ = 58757400. Its totient is φ = 10108736.

The previous prime is 25271903. The next prime is 25271941. The reversal of 25271920 is 2917252.

It is a tau number, because it is divible by the number of its divisors (20).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157870 + ... + 158029.

It is an arithmetic number, because the mean of its divisors is an integer number (2937870).

Almost surely, 2^25271920 is an apocalyptic number.

25271920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25271920 is an abundant number, since it is smaller than the sum of its proper divisors (33485480).

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

25271920 is a wasteful number, since it uses less digits than its factorization.

25271920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315912 (or 315906 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 25271920 is about 5027.1184589186. The cubic root of 25271920 is about 293.4580851369.

The spelling of 25271920 in words is "twenty-five million, two hundred seventy-one thousand, nine hundred twenty".