2172743 has 4 divisors (see below), whose sum is σ = 2205240. Its totient is φ = 2140248.

The previous prime is 2172733. The next prime is 2172761. The reversal of 2172743 is 3472712.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2172743 - 2⁴ = 2172727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172733) 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, 16148 + ... + 16281.

It is an arithmetic number, because the mean of its divisors is an integer number (551310).

2^2172743 is an apocalyptic number.

2172743 is a deficient number, since it is larger than the sum of its proper divisors (32497).

2172743 is an equidigital number, since it uses as much as digits as its factorization.

2172743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32496.

The product of its digits is 2352, while the sum is 26.

The square root of 2172743 is about 1474.0227270975. The cubic root of 2172743 is about 129.5197864848.

The spelling of 2172743 in words is "two million, one hundred seventy-two thousand, seven hundred forty-three".