12730394 has 4 divisors (see below), whose sum is σ = 19095594. Its totient is φ = 6365196.

The previous prime is 12730381. The next prime is 12730409. The reversal of 12730394 is 49303721.

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

It can be written as a sum of positive squares in only one way, i.e., 8265625 + 4464769 = 2875^2 + 2113^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3182597 + ... + 3182600.

Almost surely, 2^12730394 is an apocalyptic number.

12730394 is a deficient number, since it is larger than the sum of its proper divisors (6365200).

12730394 is an equidigital number, since it uses as much as digits as its factorization.

12730394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6365199.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 12730394 is about 3567.9677689127. The cubic root of 12730394 is about 233.4966290034.

The spelling of 12730394 in words is "twelve million, seven hundred thirty thousand, three hundred ninety-four".