12021579 has 12 divisors (see below), whose sum is σ = 17413032. Its totient is φ = 7992000.

The previous prime is 12021577. The next prime is 12021593. The reversal of 12021579 is 97512021.

It is not a de Polignac number, because 12021579 - 2¹ = 12021577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1944 + ... + 5274.

It is an arithmetic number, because the mean of its divisors is an integer number (1451086).

Almost surely, 2^12021579 is an apocalyptic number.

12021579 is a deficient number, since it is larger than the sum of its proper divisors (5391453).

12021579 is a wasteful number, since it uses less digits than its factorization.

12021579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738 (or 3735 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 12021579 is about 3467.2148765255. The cubic root of 12021579 is about 229.0799984926.

The spelling of 12021579 in words is "twelve million, twenty-one thousand, five hundred seventy-nine".