12020539 has 2 divisors, whose sum is σ = 12020540. Its totient is φ = 12020538.

The previous prime is 12020527. The next prime is 12020543. The reversal of 12020539 is 93502021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12020539 - 2⁵ = 12020507 is a prime.

It is not a weakly prime, because it can be changed into another prime (12020509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010269 + 6010270.

It is an arithmetic number, because the mean of its divisors is an integer number (6010270).

Almost surely, 2^12020539 is an apocalyptic number.

12020539 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020539 is an equidigital number, since it uses as much as digits as its factorization.

12020539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 12020539 is about 3467.0648969986. The cubic root of 12020539 is about 229.0733923147.

The spelling of 12020539 in words is "twelve million, twenty thousand, five hundred thirty-nine".