1722056 has 48 divisors (see below), whose sum is σ = 3939840. Its totient is φ = 702240.

The previous prime is 1722053. The next prime is 1722067. The reversal of 1722056 is 6502271.

It is a Harshad number since it is a multiple of its sum of digits (23).

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 (1722053) 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, 8921 + ... + 9111.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2^1722056 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 1722056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969920).

1722056 is an abundant number, since it is smaller than the sum of its proper divisors (2217784).

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

1722056 is a wasteful number, since it uses less digits than its factorization.

1722056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 1722056 is about 1312.2713134105. The cubic root of 1722056 is about 119.8622493409.

The spelling of 1722056 in words is "one million, seven hundred twenty-two thousand, fifty-six".