12036839 has 4 divisors (see below), whose sum is σ = 12079656. Its totient is φ = 11994024.

The previous prime is 12036809. The next prime is 12036847. The reversal of 12036839 is 93863021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12036839 is a prime.

It is a super-2 number, since 2×12036839² = 289770986223842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12036809) 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, 20984 + ... + 21549.

It is an arithmetic number, because the mean of its divisors is an integer number (3019914).

Almost surely, 2^12036839 is an apocalyptic number.

12036839 is a deficient number, since it is larger than the sum of its proper divisors (42817).

12036839 is an equidigital number, since it uses as much as digits as its factorization.

12036839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42816.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12036839 is about 3469.4147921516. The cubic root of 12036839 is about 229.1768876690.

Adding to 12036839 its sum of digits (32), we get a triangular number (12036871 = T₄₉₀₆).

The spelling of 12036839 in words is "twelve million, thirty-six thousand, eight hundred thirty-nine".