12279021 has 16 divisors (see below), whose sum is σ = 16787520. Its totient is φ = 7980800.

The previous prime is 12279019. The next prime is 12279041. The reversal of 12279021 is 12097221.

It is a cyclic number.

It is not a de Polignac number, because 12279021 - 2¹ = 12279019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12278982 and 12279000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12279011) 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, 30421 + ... + 30821.

It is an arithmetic number, because the mean of its divisors is an integer number (1049220).

Almost surely, 2^12279021 is an apocalyptic number.

It is an amenable number.

12279021 is a deficient number, since it is larger than the sum of its proper divisors (4508499).

12279021 is a wasteful number, since it uses less digits than its factorization.

12279021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 12279021 is about 3504.1434045998. The cubic root of 12279021 is about 230.7037111346.

The spelling of 12279021 in words is "twelve million, two hundred seventy-nine thousand, twenty-one".