25278530 has 16 divisors (see below), whose sum is σ = 45559800. Its totient is φ = 10098432.

The previous prime is 25278523. The next prime is 25278557. The reversal of 25278530 is 3587252.

It can be written as a sum of positive squares in 4 ways, for example, as 25170289 + 108241 = 5017^2 + 329^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11996 + ... + 13944.

Almost surely, 2^25278530 is an apocalyptic number.

25278530 is a deficient number, since it is larger than the sum of its proper divisors (20281270).

25278530 is a wasteful number, since it uses less digits than its factorization.

25278530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3253.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 25278530 is about 5027.7758502145. The cubic root of 25278530 is about 293.4836680612.

The spelling of 25278530 in words is "twenty-five million, two hundred seventy-eight thousand, five hundred thirty".