12857269 has 4 divisors (see below), whose sum is σ = 12873196. Its totient is φ = 12841344.

The previous prime is 12857267. The next prime is 12857279. The reversal of 12857269 is 96275821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3010225 + 9847044 = 1735^2 + 3138^2 .

It is a cyclic number.

It is not a de Polignac number, because 12857269 - 2¹ = 12857267 is a prime.

It is a super-2 number, since 2×12857269² = 330618732276722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6684 + ... + 8389.

It is an arithmetic number, because the mean of its divisors is an integer number (3218299).

Almost surely, 2^12857269 is an apocalyptic number.

It is an amenable number.

12857269 is a deficient number, since it is larger than the sum of its proper divisors (15927).

12857269 is an equidigital number, since it uses as much as digits as its factorization.

12857269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15926.

The product of its digits is 60480, while the sum is 40.

The square root of 12857269 is about 3585.7034177411. The cubic root of 12857269 is about 234.2697658296.

The spelling of 12857269 in words is "twelve million, eight hundred fifty-seven thousand, two hundred sixty-nine".