25880721 has 8 divisors (see below), whose sum is σ = 34687200. Its totient is φ = 17164032.

The previous prime is 25880713. The next prime is 25880737. The reversal of 25880721 is 12708852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25880721 - 2³ = 25880713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25880741) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 21771 + ... + 22928.

It is an arithmetic number, because the mean of its divisors is an integer number (4335900).

Almost surely, 2^25880721 is an apocalyptic number.

It is an amenable number.

25880721 is a deficient number, since it is larger than the sum of its proper divisors (8806479).

25880721 is a wasteful number, since it uses less digits than its factorization.

25880721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44895.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 25880721 is about 5087.3097998844. The cubic root of 25880721 is about 295.7958820716.

The spelling of 25880721 in words is "twenty-five million, eight hundred eighty thousand, seven hundred twenty-one".