1720233 has 6 divisors (see below), whose sum is σ = 2484794. Its totient is φ = 1146816.

The previous prime is 1720231. The next prime is 1720273. The reversal of 1720233 is 3320271.

It can be written as a sum of positive squares in only one way, i.e., 1327104 + 393129 = 1152^2 + 627^2 .

It is not a de Polignac number, because 1720233 - 2¹ = 1720231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1720231) 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 5 ways as a sum of consecutive naturals, for example, 95560 + ... + 95577.

2^1720233 is an apocalyptic number.

It is an amenable number.

1720233 is a deficient number, since it is larger than the sum of its proper divisors (764561).

1720233 is a wasteful number, since it uses less digits than its factorization.

1720233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191143 (or 191140 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 1720233 is about 1311.5765322695. The cubic root of 1720233 is about 119.8199382833.

It can be divided in two parts, 1720 and 233, that added together give a triangular number (1953 = T₆₂).

The spelling of 1720233 in words is "one million, seven hundred twenty thousand, two hundred thirty-three".