2172004 has 12 divisors (see below), whose sum is σ = 4001200. Its totient is φ = 1028808.

The previous prime is 2171999. The next prime is 2172007. The reversal of 2172004 is 4002712.

It is not an unprimeable number, because it can be changed into a prime (2172007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14214 + ... + 14365.

2^2172004 is an apocalyptic number.

It is an amenable number.

2172004 is a deficient number, since it is larger than the sum of its proper divisors (1829196).

2172004 is a wasteful number, since it uses less digits than its factorization.

2172004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28602 (or 28600 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2172004 is about 1473.7720312179. The cubic root of 2172004 is about 129.5051005976.

Adding to 2172004 its reverse (4002712), we get a palindrome (6174716).

The spelling of 2172004 in words is "two million, one hundred seventy-two thousand, four".