1722313 has 4 divisors (see below), whose sum is σ = 1768900. Its totient is φ = 1675728.

The previous prime is 1722307. The next prime is 1722319. The reversal of 1722313 is 3132271.

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

It is an interprime number because it is at equal distance from previous prime (1722307) and next prime (1722319).

It can be written as a sum of positive squares in 2 ways, for example, as 1617984 + 104329 = 1272^2 + 323^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722313 - 2¹⁷ = 1591241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1722319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23238 + ... + 23311.

It is an arithmetic number, because the mean of its divisors is an integer number (442225).

2^1722313 is an apocalyptic number.

It is an amenable number.

1722313 is a deficient number, since it is larger than the sum of its proper divisors (46587).

1722313 is an equidigital number, since it uses as much as digits as its factorization.

1722313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46586.

The product of its digits is 252, while the sum is 19.

The square root of 1722313 is about 1312.3692315808. The cubic root of 1722313 is about 119.8682118001.

Adding to 1722313 its reverse (3132271), we get a palindrome (4854584).

It can be divided in two parts, 172 and 2313, that added together give a triangular number (2485 = T₇₀).

The spelling of 1722313 in words is "one million, seven hundred twenty-two thousand, three hundred thirteen".