25901280 has 72 divisors (see below), whose sum is σ = 88393032. Its totient is φ = 6906624.

The previous prime is 25901273. The next prime is 25901303. The reversal of 25901280 is 8210952.

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 7554 + ... + 10433.

It is an arithmetic number, because the mean of its divisors is an integer number (1227681).

Almost surely, 2^25901280 is an apocalyptic number.

25901280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25901280 is an abundant number, since it is smaller than the sum of its proper divisors (62491752).

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

25901280 is a wasteful number, since it uses less digits than its factorization.

25901280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18008 (or 17997 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 25901280 is about 5089.3300148448. The cubic root of 25901280 is about 295.8741856343.

The spelling of 25901280 in words is "twenty-five million, nine hundred one thousand, two hundred eighty".