12405994 has 8 divisors (see below), whose sum is σ = 18624420. Its totient is φ = 6197856.

The previous prime is 12405961. The next prime is 12406013. The reversal of 12405994 is 49950421.

It can be written as a sum of positive squares in 2 ways, for example, as 12215025 + 190969 = 3495^2 + 437^2 .

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, 2262 + ... + 5470.

Almost surely, 2^12405994 is an apocalyptic number.

12405994 is a deficient number, since it is larger than the sum of its proper divisors (6218426).

12405994 is a wasteful number, since it uses less digits than its factorization.

12405994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 12405994 is about 3522.2143603137. The cubic root of 12405994 is about 231.4961941944.

The spelling of 12405994 in words is "twelve million, four hundred five thousand, nine hundred ninety-four".