12924021 has 16 divisors (see below), whose sum is σ = 18976320. Its totient is φ = 7758720.

The previous prime is 12924017. The next prime is 12924031. The reversal of 12924021 is 12042921.

12924021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12924021 - 2² = 12924017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12924001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1801 + ... + 5393.

It is an arithmetic number, because the mean of its divisors is an integer number (1186020).

Almost surely, 2^12924021 is an apocalyptic number.

12924021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12924021 is a deficient number, since it is larger than the sum of its proper divisors (6052299).

12924021 is a wasteful number, since it uses less digits than its factorization.

12924021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 12924021 is about 3594.9994436717. Note that the first 3 decimals coincide. The cubic root of 12924021 is about 234.6744912361.

Adding to 12924021 its reverse (12042921), we get a palindrome (24966942).

The spelling of 12924021 in words is "twelve million, nine hundred twenty-four thousand, twenty-one".