12730039 has 4 divisors (see below), whose sum is σ = 14548624. Its totient is φ = 10911456.

The previous prime is 12730033. The next prime is 12730051. The reversal of 12730039 is 93003721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93003721 = 631 ⋅147391.

It is a cyclic number.

It is not a de Polignac number, because 12730039 - 2⁵ = 12730007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12729995 and 12730022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12730033) 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, 909282 + ... + 909295.

It is an arithmetic number, because the mean of its divisors is an integer number (3637156).

Almost surely, 2^12730039 is an apocalyptic number.

12730039 is a deficient number, since it is larger than the sum of its proper divisors (1818585).

12730039 is an equidigital number, since it uses as much as digits as its factorization.

12730039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818584.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 12730039 is about 3567.9180203587. The cubic root of 12730039 is about 233.4944585528.

The spelling of 12730039 in words is "twelve million, seven hundred thirty thousand, thirty-nine".