1722072 has 48 divisors (see below), whose sum is σ = 4740120. Its totient is φ = 520960.

The previous prime is 1722067. The next prime is 1722073. The reversal of 1722072 is 2702271.

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2608 + ... + 3200.

2^1722072 is an apocalyptic number.

1722072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1722072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2370060).

1722072 is an abundant number, since it is smaller than the sum of its proper divisors (3018048).

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

1722072 is a wasteful number, since it uses less digits than its factorization.

1722072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 1722072 is about 1312.2774096966. The cubic root of 1722072 is about 119.8626205619.

The spelling of 1722072 in words is "one million, seven hundred twenty-two thousand, seventy-two".