12004778 has 4 divisors (see below), whose sum is σ = 18007170. Its totient is φ = 6002388.

The previous prime is 12004763. The next prime is 12004799. The reversal of 12004778 is 87740021.

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., 9138529 + 2866249 = 3023^2 + 1693^2 .

It is a super-2 number, since 2×12004778² = 288229389658568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12004778.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3001193 + ... + 3001196.

Almost surely, 2^12004778 is an apocalyptic number.

12004778 is a deficient number, since it is larger than the sum of its proper divisors (6002392).

12004778 is an equidigital number, since it uses as much as digits as its factorization.

12004778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002391.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 12004778 is about 3464.7911913996. The cubic root of 12004778 is about 228.9732302823.

Adding to 12004778 its reverse (87740021), we get a palindrome (99744799).

The spelling of 12004778 in words is "twelve million, four thousand, seven hundred seventy-eight".