25066521 has 12 divisors (see below), whose sum is σ = 36704148. Its totient is φ = 16481664.

The previous prime is 25066513. The next prime is 25066523. The reversal of 25066521 is 12566052.

25066521 is a `hidden beast` number, since 2 + 5 + 0 + 6 + 652 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16281225 + 8785296 = 4035^2 + 2964^2 .

It is not a de Polignac number, because 25066521 - 2³ = 25066513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25066523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18420 + ... + 19733.

It is an arithmetic number, because the mean of its divisors is an integer number (3058679).

Almost surely, 2^25066521 is an apocalyptic number.

It is an amenable number.

25066521 is a deficient number, since it is larger than the sum of its proper divisors (11637627).

25066521 is a wasteful number, since it uses less digits than its factorization.

25066521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38232 (or 38229 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 25066521 is about 5006.6476808340. The cubic root of 25066521 is about 292.6608889143.

The spelling of 25066521 in words is "twenty-five million, sixty-six thousand, five hundred twenty-one".