2172571 has 2 divisors, whose sum is σ = 2172572. Its totient is φ = 2172570.

The previous prime is 2172563. The next prime is 2172581. The reversal of 2172571 is 1752712.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2172571 - 2³ = 2172563 is a prime.

It is a pancake number, because a pancake can be divided into 2172571 parts by 2084 straight cuts.

2172571 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2172551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086285 + 1086286.

It is an arithmetic number, because the mean of its divisors is an integer number (1086286).

2^2172571 is an apocalyptic number.

2172571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172571 is an equidigital number, since it uses as much as digits as its factorization.

2172571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 980, while the sum is 25.

The square root of 2172571 is about 1473.9643822020. The cubic root of 2172571 is about 129.5163686867.

The spelling of 2172571 in words is "two million, one hundred seventy-two thousand, five hundred seventy-one".