2172975 has 24 divisors (see below), whose sum is σ = 4106880. Its totient is φ = 993120.

The previous prime is 2172967. The next prime is 2172977. The reversal of 2172975 is 5792712.

It is not a de Polignac number, because 2172975 - 2³ = 2172967 is a prime.

2172975 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1545 + ... + 2594.

It is an arithmetic number, because the mean of its divisors is an integer number (171120).

2^2172975 is an apocalyptic number.

2172975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2172975 is a deficient number, since it is larger than the sum of its proper divisors (1933905).

2172975 is a wasteful number, since it uses less digits than its factorization.

2172975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159 (or 4154 counting only the distinct ones).

The product of its digits is 8820, while the sum is 33.

The square root of 2172975 is about 1474.1014212055. The cubic root of 2172975 is about 129.5243962525.

The spelling of 2172975 in words is "two million, one hundred seventy-two thousand, nine hundred seventy-five".