12730239 has 12 divisors (see below), whose sum is σ = 18444816. Its totient is φ = 8460672.

The previous prime is 12730169. The next prime is 12730283. The reversal of 12730239 is 93203721.

It is not a de Polignac number, because 12730239 - 2⁹ = 12729727 is a prime.

It is a super-3 number, since 3×12730239³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12730439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1174 + ... + 5180.

It is an arithmetic number, because the mean of its divisors is an integer number (1537068).

Almost surely, 2^12730239 is an apocalyptic number.

12730239 is a deficient number, since it is larger than the sum of its proper divisors (5714577).

12730239 is a wasteful number, since it uses less digits than its factorization.

12730239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366 (or 4363 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 12730239 is about 3567.9460477984. The cubic root of 12730239 is about 233.4956813468.

The spelling of 12730239 in words is "twelve million, seven hundred thirty thousand, two hundred thirty-nine".