12013857 has 12 divisors (see below), whose sum is σ = 17391504. Its totient is φ = 7991640.

The previous prime is 12013847. The next prime is 12013867. The reversal of 12013857 is 75831021.

12013857 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12013847) and next prime (12013867).

It is not a de Polignac number, because 12013857 - 2⁸ = 12013601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12013857.

It is not an unprimeable number, because it can be changed into a prime (12013847) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3882 + ... + 6252.

It is an arithmetic number, because the mean of its divisors is an integer number (1449292).

Almost surely, 2^12013857 is an apocalyptic number.

It is an amenable number.

12013857 is a deficient number, since it is larger than the sum of its proper divisors (5377647).

12013857 is a wasteful number, since it uses less digits than its factorization.

12013857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940 (or 2937 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 12013857 is about 3466.1011237412. The cubic root of 12013857 is about 229.0309385302.

Adding to 12013857 its reverse (75831021), we get a palindrome (87844878).

The spelling of 12013857 in words is "twelve million, thirteen thousand, eight hundred fifty-seven".