12157605 has 48 divisors (see below), whose sum is σ = 22129536. Its totient is φ = 6168960.

The previous prime is 12157597. The next prime is 12157627. The reversal of 12157605 is 50675121.

12157605 is a `hidden beast` number, since 1 + 2 + 1 + 57 + 605 = 666.

It is not a de Polignac number, because 12157605 - 2³ = 12157597 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 47 ways as a sum of consecutive naturals, for example, 117984 + ... + 118086.

It is an arithmetic number, because the mean of its divisors is an integer number (461032).

Almost surely, 2^12157605 is an apocalyptic number.

12157605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12157605 is a deficient number, since it is larger than the sum of its proper divisors (9971931).

12157605 is a wasteful number, since it uses less digits than its factorization.

12157605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 12157605 is about 3486.7757312451. The cubic root of 12157605 is about 229.9407850081.

The spelling of 12157605 in words is "twelve million, one hundred fifty-seven thousand, six hundred five".