25278275 has 12 divisors (see below), whose sum is σ = 34194984. Its totient is φ = 18384000.

The previous prime is 25278247. The next prime is 25278287. The reversal of 25278275 is 57287252.

It is not a de Polignac number, because 25278275 - 2¹⁰ = 25277251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45686 + ... + 46235.

It is an arithmetic number, because the mean of its divisors is an integer number (2849582).

Almost surely, 2^25278275 is an apocalyptic number.

25278275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25278275 is a deficient number, since it is larger than the sum of its proper divisors (8916709).

25278275 is a wasteful number, since it uses less digits than its factorization.

25278275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91942 (or 91937 counting only the distinct ones).

The product of its digits is 78400, while the sum is 38.

The square root of 25278275 is about 5027.7504910248. The cubic root of 25278275 is about 293.4826812081.

The spelling of 25278275 in words is "twenty-five million, two hundred seventy-eight thousand, two hundred seventy-five".