1722204 has 36 divisors (see below), whose sum is σ = 4750200. Its totient is φ = 521760.

The previous prime is 1722199. The next prime is 1722209. The reversal of 1722204 is 4022271.

It is an interprime number because it is at equal distance from previous prime (1722199) and next prime (1722209).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722209) 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 11 ways as a sum of consecutive naturals, for example, 1779 + ... + 2570.

It is an arithmetic number, because the mean of its divisors is an integer number (131950).

2^1722204 is an apocalyptic number.

It is an amenable number.

1722204 is an abundant number, since it is smaller than the sum of its proper divisors (3027996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1722204 is a wasteful number, since it uses less digits than its factorization.

1722204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370 (or 4365 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1722204 is about 1312.3277029767. The cubic root of 1722204 is about 119.8656830474.

Adding to 1722204 its reverse (4022271), we get a palindrome (5744475).

The spelling of 1722204 in words is "one million, seven hundred twenty-two thousand, two hundred four".