12730345 has 8 divisors (see below), whose sum is σ = 15374664. Its totient is φ = 10118784.

The previous prime is 12730327. The next prime is 12730349. The reversal of 12730345 is 54303721.

It can be written as a sum of positive squares in 4 ways, for example, as 1734489 + 10995856 = 1317^2 + 3316^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12730345 - 2⁵ = 12730313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12730349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7324 + ... + 8893.

It is an arithmetic number, because the mean of its divisors is an integer number (1921833).

Almost surely, 2^12730345 is an apocalyptic number.

It is an amenable number.

12730345 is a deficient number, since it is larger than the sum of its proper divisors (2644319).

12730345 is a wasteful number, since it uses less digits than its factorization.

12730345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16379.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 12730345 is about 3567.9609022522. The cubic root of 12730345 is about 233.4963294225.

The spelling of 12730345 in words is "twelve million, seven hundred thirty thousand, three hundred forty-five".