25078881 has 16 divisors (see below), whose sum is σ = 34911360. Its totient is φ = 15993600.

The previous prime is 25078853. The next prime is 25078883. The reversal of 25078881 is 18887052.

It is not a de Polignac number, because 25078881 - 2⁵ = 25078849 is a prime.

It is a super-2 number, since 2×25078881² = 1257900544424322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25078883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8556 + ... + 11106.

It is an arithmetic number, because the mean of its divisors is an integer number (2181960).

Almost surely, 2^25078881 is an apocalyptic number.

It is an amenable number.

25078881 is a deficient number, since it is larger than the sum of its proper divisors (9832479).

25078881 is a wasteful number, since it uses less digits than its factorization.

25078881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696.

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 25078881 is about 5007.8818875848. The cubic root of 25078881 is about 292.7089835316.

The spelling of 25078881 in words is "twenty-five million, seventy-eight thousand, eight hundred eighty-one".