12824785 has 4 divisors (see below), whose sum is σ = 15389748. Its totient is φ = 10259824.

The previous prime is 12824767. The next prime is 12824789. The reversal of 12824785 is 58742821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58742821 = 5869 ⋅10009.

It can be written as a sum of positive squares in 2 ways, for example, as 2782224 + 10042561 = 1668^2 + 3169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12824785 is a prime.

It is a super-2 number, since 2×12824785² = 328950220592450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12824789) 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, 1282474 + ... + 1282483.

It is an arithmetic number, because the mean of its divisors is an integer number (3847437).

Almost surely, 2^12824785 is an apocalyptic number.

It is an amenable number.

12824785 is a deficient number, since it is larger than the sum of its proper divisors (2564963).

12824785 is an equidigital number, since it uses as much as digits as its factorization.

12824785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564962.

The product of its digits is 35840, while the sum is 37.

The square root of 12824785 is about 3581.1708979048. The cubic root of 12824785 is about 234.0723045852.

The spelling of 12824785 in words is "twelve million, eight hundred twenty-four thousand, seven hundred eighty-five".