12039531 has 16 divisors (see below), whose sum is σ = 18461184. Its totient is φ = 6836544.

The previous prime is 12039523. The next prime is 12039539. The reversal of 12039531 is 13593021.

It is a happy number.

12039531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12039523) and next prime (12039539).

It is not a de Polignac number, because 12039531 - 2³ = 12039523 is a prime.

It is a super-2 number, since 2×12039531² = 289900613399922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12039539) 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, 1791 + ... + 5223.

It is an arithmetic number, because the mean of its divisors is an integer number (1153824).

Almost surely, 2^12039531 is an apocalyptic number.

12039531 is a deficient number, since it is larger than the sum of its proper divisors (6421653).

12039531 is a wasteful number, since it uses less digits than its factorization.

12039531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 12039531 is about 3469.8027321449. The cubic root of 12039531 is about 229.1939712847.

The spelling of 12039531 in words is "twelve million, thirty-nine thousand, five hundred thirty-one".