12291385 has 16 divisors (see below), whose sum is σ = 15681600. Its totient is φ = 9222336.

The previous prime is 12291379. The next prime is 12291403. The reversal of 12291385 is 58319221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12291385 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9762 + ... + 10948.

It is an arithmetic number, because the mean of its divisors is an integer number (980100).

Almost surely, 2^12291385 is an apocalyptic number.

It is an amenable number.

12291385 is a deficient number, since it is larger than the sum of its proper divisors (3390215).

12291385 is a wasteful number, since it uses less digits than its factorization.

12291385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320.

The product of its digits is 4320, while the sum is 31.

The square root of 12291385 is about 3505.9071579265. The cubic root of 12291385 is about 230.7811186041.

The spelling of 12291385 in words is "twelve million, two hundred ninety-one thousand, three hundred eighty-five".