12857605 has 8 divisors (see below), whose sum is σ = 15449112. Its totient is φ = 10272768.

The previous prime is 12857573. The next prime is 12857609. The reversal of 12857605 is 50675821.

It can be written as a sum of positive squares in 4 ways, for example, as 248004 + 12609601 = 498^2 + 3551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12857605 - 2⁵ = 12857573 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 (12857609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5029 + ... + 7141.

It is an arithmetic number, because the mean of its divisors is an integer number (1931139).

Almost surely, 2^12857605 is an apocalyptic number.

It is an amenable number.

12857605 is a deficient number, since it is larger than the sum of its proper divisors (2591507).

12857605 is a wasteful number, since it uses less digits than its factorization.

12857605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 12857605 is about 3585.7502701666. The cubic root of 12857605 is about 234.2718065418.

The spelling of 12857605 in words is "twelve million, eight hundred fifty-seven thousand, six hundred five".