1722160 has 80 divisors (see below), whose sum is σ = 4642560. Its totient is φ = 587520.

The previous prime is 1722137. The next prime is 1722163. The reversal of 1722160 is 612271.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16669 + ... + 16771.

It is an arithmetic number, because the mean of its divisors is an integer number (58032).

2^1722160 is an apocalyptic number.

1722160 is a gapful number since it is divisible by the number (10) 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 1722160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2321280).

1722160 is an abundant number, since it is smaller than the sum of its proper divisors (2920400).

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

1722160 is a wasteful number, since it uses less digits than its factorization.

1722160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1722160 is about 1312.3109387641. The cubic root of 1722160 is about 119.8646622363.

It can be divided in two parts, 172 and 2160, that added together give a palindrome (2332).

The spelling of 1722160 in words is "one million, seven hundred twenty-two thousand, one hundred sixty".