12735239 has 4 divisors (see below), whose sum is σ = 13893000. Its totient is φ = 11577480.

The previous prime is 12735223. The next prime is 12735251. The reversal of 12735239 is 93253721.

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

It is a cyclic number.

It is not a de Polignac number, because 12735239 - 2⁴ = 12735223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12735259) 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, 578864 + ... + 578885.

It is an arithmetic number, because the mean of its divisors is an integer number (3473250).

Almost surely, 2^12735239 is an apocalyptic number.

12735239 is a deficient number, since it is larger than the sum of its proper divisors (1157761).

12735239 is a wasteful number, since it uses less digits than its factorization.

12735239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157760.

The product of its digits is 11340, while the sum is 32.

The square root of 12735239 is about 3568.6466622517. The cubic root of 12735239 is about 233.5262470362.

The spelling of 12735239 in words is "twelve million, seven hundred thirty-five thousand, two hundred thirty-nine".