12857029 has 4 divisors (see below), whose sum is σ = 13001580. Its totient is φ = 12712480.

The previous prime is 12857021. The next prime is 12857057. The reversal of 12857029 is 92075821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92075821 = 1019 ⋅90359.

It can be written as a sum of positive squares in 2 ways, for example, as 5712100 + 7144929 = 2390^2 + 2673^2 .

It is a cyclic number.

It is not a de Polignac number, because 12857029 - 2³ = 12857021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12856985 and 12857003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857021) 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 3 ways as a sum of consecutive naturals, for example, 72142 + ... + 72319.

It is an arithmetic number, because the mean of its divisors is an integer number (3250395).

Almost surely, 2^12857029 is an apocalyptic number.

It is an amenable number.

12857029 is a deficient number, since it is larger than the sum of its proper divisors (144551).

12857029 is an equidigital number, since it uses as much as digits as its factorization.

12857029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144550.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 12857029 is about 3585.6699513480. The cubic root of 12857029 is about 234.2683081563.

The spelling of 12857029 in words is "twelve million, eight hundred fifty-seven thousand, twenty-nine".