12730138 has 8 divisors (see below), whose sum is σ = 19501632. Its totient is φ = 6229596.

The previous prime is 12730121. The next prime is 12730153. The reversal of 12730138 is 83103721.

12730138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67620 + ... + 67807.

It is an arithmetic number, because the mean of its divisors is an integer number (2437704).

Almost surely, 2^12730138 is an apocalyptic number.

12730138 is a deficient number, since it is larger than the sum of its proper divisors (6771494).

12730138 is a wasteful number, since it uses less digits than its factorization.

12730138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135476.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12730138 is about 3567.9318939688. The cubic root of 12730138 is about 233.4950638374.

Adding to 12730138 its reverse (83103721), we get a palindrome (95833859).

The spelling of 12730138 in words is "twelve million, seven hundred thirty thousand, one hundred thirty-eight".