1720122 has 8 divisors (see below), whose sum is σ = 3440256. Its totient is φ = 573372.

The previous prime is 1720109. The next prime is 1720123. The reversal of 1720122 is 2210271.

It is a sphenic number, since it is the product of 3 distinct primes.

1720122 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1720123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143338 + ... + 143349.

It is an arithmetic number, because the mean of its divisors is an integer number (430032).

2^1720122 is an apocalyptic number.

1720122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1720122 is a wasteful number, since it uses less digits than its factorization.

1720122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286692.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1720122 is about 1311.5342160996. The cubic root of 1720122 is about 119.8173610550.

Adding to 1720122 its reverse (2210271), we get a palindrome (3930393).

The spelling of 1720122 in words is "one million, seven hundred twenty thousand, one hundred twenty-two".