12004645 has 4 divisors (see below), whose sum is σ = 14405580. Its totient is φ = 9603712.

The previous prime is 12004633. The next prime is 12004661. The reversal of 12004645 is 54640021.

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 3437316 + 8567329 = 1854^2 + 2927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12004645 is a prime.

It is a super-2 number, since 2×12004645² = 288223003152050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1200460 + ... + 1200469.

It is an arithmetic number, because the mean of its divisors is an integer number (3601395).

Almost surely, 2^12004645 is an apocalyptic number.

It is an amenable number.

12004645 is a deficient number, since it is larger than the sum of its proper divisors (2400935).

12004645 is an equidigital number, since it uses as much as digits as its factorization.

12004645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400934.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 12004645 is about 3464.7719982706. The cubic root of 12004645 is about 228.9723846870.

Adding to 12004645 its reverse (54640021), we get a palindrome (66644666).

The spelling of 12004645 in words is "twelve million, four thousand, six hundred forty-five".