12539443 has 6 divisors (see below), whose sum is σ = 14586756. Its totient is φ = 10748052.

The previous prime is 12539389. The next prime is 12539467. The reversal of 12539443 is 34493521.

It is not a de Polignac number, because 12539443 - 2⁹ = 12538931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12539243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127905 + ... + 128002.

It is an arithmetic number, because the mean of its divisors is an integer number (2431126).

Almost surely, 2^12539443 is an apocalyptic number.

12539443 is a deficient number, since it is larger than the sum of its proper divisors (2047313).

12539443 is an equidigital number, since it uses as much as digits as its factorization.

12539443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255921 (or 255914 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 12539443 is about 3541.1075950894. The cubic root of 12539443 is about 232.3232896288.

The spelling of 12539443 in words is "twelve million, five hundred thirty-nine thousand, four hundred forty-three".