12020531 has 4 divisors (see below), whose sum is σ = 12144552. Its totient is φ = 11896512.

The previous prime is 12020527. The next prime is 12020539. The reversal of 12020531 is 13502021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13502021 = 13 ⋅1038617.

It is a cyclic number.

It is not a de Polignac number, because 12020531 - 2² = 12020527 is a prime.

It is a super-2 number, since 2×12020531² = 288986331043922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61865 + ... + 62058.

It is an arithmetic number, because the mean of its divisors is an integer number (3036138).

Almost surely, 2^12020531 is an apocalyptic number.

12020531 is a deficient number, since it is larger than the sum of its proper divisors (124021).

12020531 is an equidigital number, since it uses as much as digits as its factorization.

12020531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124020.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 12020531 is about 3467.0637432848. The cubic root of 12020531 is about 229.0733414965.

Adding to 12020531 its reverse (13502021), we get a palindrome (25522552).

The spelling of 12020531 in words is "twelve million, twenty thousand, five hundred thirty-one".