1722271 has 4 divisors (see below), whose sum is σ = 1732752. Its totient is φ = 1711792.

The previous prime is 1722251. The next prime is 1722283.

1722271 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1722271 - 2¹¹ = 1720223 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722211) 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 3 ways as a sum of consecutive naturals, for example, 4990 + ... + 5323.

It is an arithmetic number, because the mean of its divisors is an integer number (433188).

2^1722271 is an apocalyptic number.

1722271 is a deficient number, since it is larger than the sum of its proper divisors (10481).

1722271 is a wasteful number, since it uses less digits than its factorization.

1722271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10480.

The product of its digits is 392, while the sum is 22.

The square root of 1722271 is about 1312.3532298890. The cubic root of 1722271 is about 119.8672374309.

The spelling of 1722271 in words is "one million, seven hundred twenty-two thousand, two hundred seventy-one".