12904394 has 8 divisors (see below), whose sum is σ = 20495268. Its totient is φ = 6072640.

The previous prime is 12904373. The next prime is 12904399. The reversal of 12904394 is 49340921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12285025 + 619369 = 3505^2 + 787^2 .

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 12904394.

It is not an unprimeable number, because it can be changed into a prime (12904399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189737 + ... + 189804.

Almost surely, 2^12904394 is an apocalyptic number.

12904394 is a deficient number, since it is larger than the sum of its proper divisors (7590874).

12904394 is a wasteful number, since it uses less digits than its factorization.

12904394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379560.

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

The square root of 12904394 is about 3592.2686425155. The cubic root of 12904394 is about 234.5556353008. Note that the first 3 decimals are identical.

The spelling of 12904394 in words is "twelve million, nine hundred four thousand, three hundred ninety-four".