12004013 has 4 divisors (see below), whose sum is σ = 13718880. Its totient is φ = 10289148.

The previous prime is 12003997. The next prime is 12004033. The reversal of 12004013 is 31040021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31040021 = 31 ⋅1001291.

It is a cyclic number.

It is not a de Polignac number, because 12004013 - 2⁴ = 12003997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12003985 and 12004003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12004033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857423 + ... + 857436.

It is an arithmetic number, because the mean of its divisors is an integer number (3429720).

Almost surely, 2^12004013 is an apocalyptic number.

It is an amenable number.

12004013 is a deficient number, since it is larger than the sum of its proper divisors (1714867).

12004013 is an equidigital number, since it uses as much as digits as its factorization.

12004013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714866.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12004013 is about 3464.6807933777. The cubic root of 12004013 is about 228.9683664344.

Adding to 12004013 its reverse (31040021), we get a palindrome (43044034).

The spelling of 12004013 in words is "twelve million, four thousand, thirteen".