12157285 has 16 divisors (see below), whose sum is σ = 16732800. Its totient is φ = 8306496.

The previous prime is 12157273. The next prime is 12157303. The reversal of 12157285 is 58275121.

It is a cyclic number.

It is not a de Polignac number, because 12157285 - 2¹¹ = 12155237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14251 + ... + 15079.

It is an arithmetic number, because the mean of its divisors is an integer number (1045800).

Almost surely, 2^12157285 is an apocalyptic number.

It is an amenable number.

12157285 is a deficient number, since it is larger than the sum of its proper divisors (4575515).

12157285 is an equidigital number, since it uses as much as digits as its factorization.

12157285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260.

The product of its digits is 5600, while the sum is 31.

The square root of 12157285 is about 3486.7298432772. The cubic root of 12157285 is about 229.9387675686.

The spelling of 12157285 in words is "twelve million, one hundred fifty-seven thousand, two hundred eighty-five".