12857479 has 4 divisors (see below), whose sum is σ = 12971376. Its totient is φ = 12743584.

The previous prime is 12857443. The next prime is 12857489. The reversal of 12857479 is 97475821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97475821 = 67 ⋅1454863.

It is a cyclic number.

It is not a de Polignac number, because 12857479 - 2¹⁷ = 12726407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56779 + ... + 57004.

It is an arithmetic number, because the mean of its divisors is an integer number (3242844).

Almost surely, 2^12857479 is an apocalyptic number.

12857479 is a deficient number, since it is larger than the sum of its proper divisors (113897).

12857479 is a wasteful number, since it uses less digits than its factorization.

12857479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113896.

The product of its digits is 141120, while the sum is 43.

The square root of 12857479 is about 3585.7327005788. The cubic root of 12857479 is about 234.2710412789.

The spelling of 12857479 in words is "twelve million, eight hundred fifty-seven thousand, four hundred seventy-nine".