1722112 has 54 divisors (see below), whose sum is σ = 4059384. Its totient is φ = 714240.

The previous prime is 1722089. The next prime is 1722113. The reversal of 1722112 is 2112271.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55537 + ... + 55567.

2^1722112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1722112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2029692).

1722112 is an abundant number, since it is smaller than the sum of its proper divisors (2337272).

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

1722112 is an frugal number, since it uses more digits than its factorization.

1722112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 40 counting only the distinct ones).

The product of its digits is 56, while the sum is 16.

The square root of 1722112 is about 1312.2926502880. The cubic root of 1722112 is about 119.8635486043.

Adding to 1722112 its reverse (2112271), we get a palindrome (3834383).

The spelling of 1722112 in words is "one million, seven hundred twenty-two thousand, one hundred twelve".