12004978 has 4 divisors (see below), whose sum is σ = 18007470. Its totient is φ = 6002488.

The previous prime is 12004973. The next prime is 12004981. The reversal of 12004978 is 87940021.

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., 11648569 + 356409 = 3413^2 + 597^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12004973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3001243 + ... + 3001246.

Almost surely, 2^12004978 is an apocalyptic number.

12004978 is a deficient number, since it is larger than the sum of its proper divisors (6002492).

12004978 is an equidigital number, since it uses as much as digits as its factorization.

12004978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002491.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 12004978 is about 3464.8200530475. The cubic root of 12004978 is about 228.9745018424.

Adding to 12004978 its reverse (87940021), we get a palindrome (99944999).

The spelling of 12004978 in words is "twelve million, four thousand, nine hundred seventy-eight".