2175643 has 4 divisors (see below), whose sum is σ = 2303640. Its totient is φ = 2047648.

The previous prime is 2175629. The next prime is 2175659. The reversal of 2175643 is 3465712.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2175643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2175683) 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, 63973 + ... + 64006.

It is an arithmetic number, because the mean of its divisors is an integer number (575910).

2^2175643 is an apocalyptic number.

2175643 is a deficient number, since it is larger than the sum of its proper divisors (127997).

2175643 is a wasteful number, since it uses less digits than its factorization.

2175643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127996.

The product of its digits is 5040, while the sum is 28.

The square root of 2175643 is about 1475.0061016823. The cubic root of 2175643 is about 129.5773850127.

The spelling of 2175643 in words is "two million, one hundred seventy-five thousand, six hundred forty-three".