2173945 has 8 divisors (see below), whose sum is σ = 2629440. Its totient is φ = 1725360.

The previous prime is 2173907. The next prime is 2173957. The reversal of 2173945 is 5493712.

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

It is not a de Polignac number, because 2173945 - 2¹⁹ = 1649657 is a prime.

2173945 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005 + ... + 2314.

It is an arithmetic number, because the mean of its divisors is an integer number (328680).

2^2173945 is an apocalyptic number.

It is an amenable number.

2173945 is a deficient number, since it is larger than the sum of its proper divisors (455495).

2173945 is a wasteful number, since it uses less digits than its factorization.

2173945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455.

The product of its digits is 7560, while the sum is 31.

The square root of 2173945 is about 1474.4303984929. The cubic root of 2173945 is about 129.5436662969.

The spelling of 2173945 in words is "two million, one hundred seventy-three thousand, nine hundred forty-five".