12505285 has 16 divisors (see below), whose sum is σ = 17112816. Its totient is φ = 8690688.

The previous prime is 12505271. The next prime is 12505291. The reversal of 12505285 is 58250521.

It can be written as a sum of positive squares in 8 ways, for example, as 443556 + 12061729 = 666^2 + 3473^2 .

It is a cyclic number.

It is not a de Polignac number, because 12505285 - 2¹⁵ = 12472517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4554 + ... + 6763.

It is an arithmetic number, because the mean of its divisors is an integer number (1069551).

Almost surely, 2^12505285 is an apocalyptic number.

It is an amenable number.

12505285 is a deficient number, since it is larger than the sum of its proper divisors (4607531).

12505285 is a wasteful number, since it uses less digits than its factorization.

12505285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11352.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 12505285 is about 3536.2812388157. The cubic root of 12505285 is about 232.1121448014.

The spelling of 12505285 in words is "twelve million, five hundred five thousand, two hundred eighty-five".