12730397 has 4 divisors (see below), whose sum is σ = 12904860. Its totient is φ = 12555936.

The previous prime is 12730381. The next prime is 12730409. The reversal of 12730397 is 79303721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4923961 + 7806436 = 2219^2 + 2794^2 .

It is a cyclic number.

It is not a de Polignac number, because 12730397 - 2⁴ = 12730381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12730307) 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, 87122 + ... + 87267.

It is an arithmetic number, because the mean of its divisors is an integer number (3226215).

Almost surely, 2^12730397 is an apocalyptic number.

It is an amenable number.

12730397 is a deficient number, since it is larger than the sum of its proper divisors (174463).

12730397 is an equidigital number, since it uses as much as digits as its factorization.

12730397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174462.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 12730397 is about 3567.9681893201. The cubic root of 12730397 is about 233.4966473451.

The spelling of 12730397 in words is "twelve million, seven hundred thirty thousand, three hundred ninety-seven".