1722223 has 4 divisors (see below), whose sum is σ = 1781640. Its totient is φ = 1662808.

The previous prime is 1722211. The next prime is 1722241. The reversal of 1722223 is 3222271.

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 1722223 - 2⁵ = 1722191 is a prime.

It is a d-powerful number, because it can be written as 1 + 7⁶ + 2 + 2³ + 2¹¹ + 2¹³ + 3¹³ .

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 1722223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722283) 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, 29665 + ... + 29722.

It is an arithmetic number, because the mean of its divisors is an integer number (445410).

2^1722223 is an apocalyptic number.

1722223 is a deficient number, since it is larger than the sum of its proper divisors (59417).

1722223 is an equidigital number, since it uses as much as digits as its factorization.

1722223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59416.

The product of its digits is 336, while the sum is 19.

The square root of 1722223 is about 1312.3349420022. The cubic root of 1722223 is about 119.8661238468.

Adding to 1722223 its reverse (3222271), we get a palindrome (4944494).

It can be divided in two parts, 172222 and 3, that added together give a square (172225 = 415²).

The spelling of 1722223 in words is "one million, seven hundred twenty-two thousand, two hundred twenty-three".