12561285 has 16 divisors (see below), whose sum is σ = 21925440. Its totient is φ = 6090240.

The previous prime is 12561257. The next prime is 12561287. The reversal of 12561285 is 58216521.

It is not a de Polignac number, because 12561285 - 2⁶ = 12561221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37900 + ... + 38229.

It is an arithmetic number, because the mean of its divisors is an integer number (1370340).

Almost surely, 2^12561285 is an apocalyptic number.

12561285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12561285 is a deficient number, since it is larger than the sum of its proper divisors (9364155).

12561285 is a wasteful number, since it uses less digits than its factorization.

12561285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76148.

The product of its digits is 4800, while the sum is 30.

The square root of 12561285 is about 3544.1903165603. The cubic root of 12561285 is about 232.4581032149.

The spelling of 12561285 in words is "twelve million, five hundred sixty-one thousand, two hundred eighty-five".