1722225 has 12 divisors (see below), whose sum is σ = 2847536. Its totient is φ = 918480.

The previous prime is 1722211. The next prime is 1722241. The reversal of 1722225 is 5222271.

It is a happy number.

It is not a de Polignac number, because 1722225 - 2⁴ = 1722209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 11407 + ... + 11556.

2^1722225 is an apocalyptic number.

1722225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1722225 is a deficient number, since it is larger than the sum of its proper divisors (1125311).

1722225 is a wasteful number, since it uses less digits than its factorization.

1722225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22976 (or 22971 counting only the distinct ones).

The product of its digits is 560, while the sum is 21.

The square root of 1722225 is about 1312.3357040026. The cubic root of 1722225 is about 119.8661702466.

Adding to 1722225 its reverse (5222271), we get a palindrome (6944496).

The spelling of 1722225 in words is "one million, seven hundred twenty-two thousand, two hundred twenty-five".