12479021 has 2 divisors, whose sum is σ = 12479022. Its totient is φ = 12479020.

The previous prime is 12479011. The next prime is 12479023. The reversal of 12479021 is 12097421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6786025 + 5692996 = 2605^2 + 2386^2 .

It is a cyclic number.

It is not a de Polignac number, because 12479021 - 2¹⁸ = 12216877 is a prime.

Together with 12479023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12479023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6239510 + 6239511.

It is an arithmetic number, because the mean of its divisors is an integer number (6239511).

Almost surely, 2^12479021 is an apocalyptic number.

It is an amenable number.

12479021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12479021 is an equidigital number, since it uses as much as digits as its factorization.

12479021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 12479021 is about 3532.5657814116. The cubic root of 12479021 is about 231.9495344554.

The spelling of 12479021 in words is "twelve million, four hundred seventy-nine thousand, twenty-one".