2172671 has 6 divisors (see below), whose sum is σ = 2208816. Its totient is φ = 2137100.

The previous prime is 2172659. The next prime is 2172673. The reversal of 2172671 is 1762712.

It is not a de Polignac number, because 2172671 - 2¹⁸ = 1910527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2172671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4826 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (368136).

2^2172671 is an apocalyptic number.

2172671 is a deficient number, since it is larger than the sum of its proper divisors (36145).

2172671 is an frugal number, since it uses more digits than its factorization.

2172671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 502 counting only the distinct ones).

The product of its digits is 1176, while the sum is 26.

The square root of 2172671 is about 1473.9983039339. The cubic root of 2172671 is about 129.5183558006.

The spelling of 2172671 in words is "two million, one hundred seventy-two thousand, six hundred seventy-one".