12731306 has 8 divisors (see below), whose sum is σ = 21825120. Its totient is φ = 5456268.

The previous prime is 12731281. The next prime is 12731339. The reversal of 12731306 is 60313721.

It is a happy number.

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, 454676 + ... + 454703.

It is an arithmetic number, because the mean of its divisors is an integer number (2728140).

Almost surely, 2^12731306 is an apocalyptic number.

12731306 is a deficient number, since it is larger than the sum of its proper divisors (9093814).

12731306 is an equidigital number, since it uses as much as digits as its factorization.

12731306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909388.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 12731306 is about 3568.0955704689. The cubic root of 12731306 is about 233.5022047366.

The spelling of 12731306 in words is "twelve million, seven hundred thirty-one thousand, three hundred six".