25278875 has 8 divisors (see below), whose sum is σ = 31548192. Its totient is φ = 20223000.

The previous prime is 25278871. The next prime is 25278887. The reversal of 25278875 is 57887252.

It is not a de Polignac number, because 25278875 - 2² = 25278871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25278871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100991 + ... + 101240.

It is an arithmetic number, because the mean of its divisors is an integer number (3943524).

Almost surely, 2^25278875 is an apocalyptic number.

25278875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25278875 is a deficient number, since it is larger than the sum of its proper divisors (6269317).

25278875 is an equidigital number, since it uses as much as digits as its factorization.

25278875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202246 (or 202236 counting only the distinct ones).

The product of its digits is 313600, while the sum is 44.

The square root of 25278875 is about 5027.8101595028. The cubic root of 25278875 is about 293.4850032049.

The spelling of 25278875 in words is "twenty-five million, two hundred seventy-eight thousand, eight hundred seventy-five".