2172998 has 8 divisors (see below), whose sum is σ = 3328992. Its totient is φ = 1063336.

The previous prime is 2172997. The next prime is 2173001. The reversal of 2172998 is 8992712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172997) 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, 11465 + ... + 11652.

It is an arithmetic number, because the mean of its divisors is an integer number (416124).

2^2172998 is an apocalyptic number.

2172998 is a deficient number, since it is larger than the sum of its proper divisors (1155994).

2172998 is a wasteful number, since it uses less digits than its factorization.

2172998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23166.

The product of its digits is 18144, while the sum is 38.

The square root of 2172998 is about 1474.1092225476. The cubic root of 2172998 is about 129.5248532374.

The spelling of 2172998 in words is "two million, one hundred seventy-two thousand, nine hundred ninety-eight".