12139437 has 4 divisors (see below), whose sum is σ = 16185920. Its totient is φ = 8092956.

The previous prime is 12139417. The next prime is 12139447. The reversal of 12139437 is 73493121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12139437 - 2⁸ = 12139181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139417) 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, 2023237 + ... + 2023242.

It is an arithmetic number, because the mean of its divisors is an integer number (4046480).

Almost surely, 2^12139437 is an apocalyptic number.

It is an amenable number.

12139437 is a deficient number, since it is larger than the sum of its proper divisors (4046483).

12139437 is an equidigital number, since it uses as much as digits as its factorization.

12139437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4046482.

The product of its digits is 4536, while the sum is 30.

The square root of 12139437 is about 3484.1694849706. The cubic root of 12139437 is about 229.8261887846.

The spelling of 12139437 in words is "twelve million, one hundred thirty-nine thousand, four hundred thirty-seven".