1720214 has 4 divisors (see below), whose sum is σ = 2580324. Its totient is φ = 860106.

The previous prime is 1720211. The next prime is 1720217. The reversal of 1720214 is 4120271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4120271 = 1471 ⋅2801.

It is an interprime number because it is at equal distance from previous prime (1720211) and next prime (1720217).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1720192 and 1720201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720211) 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 as a sum of consecutive naturals, namely, 430052 + ... + 430055.

It is an arithmetic number, because the mean of its divisors is an integer number (645081).

2^1720214 is an apocalyptic number.

1720214 is a deficient number, since it is larger than the sum of its proper divisors (860110).

1720214 is an equidigital number, since it uses as much as digits as its factorization.

1720214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860109.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1720214 is about 1311.5692890580. The cubic root of 1720214 is about 119.8194971440.

Adding to 1720214 its reverse (4120271), we get a palindrome (5840485).

The spelling of 1720214 in words is "one million, seven hundred twenty thousand, two hundred fourteen".