12122004 has 12 divisors (see below), whose sum is σ = 28284704. Its totient is φ = 4040664.

The previous prime is 12121987. The next prime is 12122009. The reversal of 12122004 is 40022121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 1010167 = 12122004 / (1 + 2 + 1 + 2 + 2 + 0 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505072 + ... + 505095.

Almost surely, 2^12122004 is an apocalyptic number.

It is an amenable number.

12122004 is an abundant number, since it is smaller than the sum of its proper divisors (16162700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12122004 is a wasteful number, since it uses less digits than its factorization.

12122004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010174 (or 1010172 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 12122004 is about 3481.6668421892. Note that the first 3 decimals coincide. The cubic root of 12122004 is about 229.7161210944.

Adding to 12122004 its reverse (40022121), we get a palindrome (52144125).

The spelling of 12122004 in words is "twelve million, one hundred twenty-two thousand, four".