12403994 has 8 divisors (see below), whose sum is σ = 18635508. Its totient is φ = 6192160.

The previous prime is 12403973. The next prime is 12404003. The reversal of 12403994 is 49930421.

It is a happy number.

12403994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11526025 + 877969 = 3395^2 + 937^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12403994.

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, 3227 + ... + 5934.

Almost surely, 2^12403994 is an apocalyptic number.

12403994 is a deficient number, since it is larger than the sum of its proper divisors (6231514).

12403994 is an equidigital number, since it uses as much as digits as its factorization.

12403994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9840.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12403994 is about 3521.9304365646. The cubic root of 12403994 is about 231.4837535072.

The spelling of 12403994 in words is "twelve million, four hundred three thousand, nine hundred ninety-four".