1720143 has 8 divisors (see below), whose sum is σ = 2548400. Its totient is φ = 1146744.

The previous prime is 1720133. The next prime is 1720151. The reversal of 1720143 is 3410271.

It is not a de Polignac number, because 1720143 - 2¹² = 1716047 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31828 + ... + 31881.

It is an arithmetic number, because the mean of its divisors is an integer number (318550).

2^1720143 is an apocalyptic number.

1720143 is a deficient number, since it is larger than the sum of its proper divisors (828257).

1720143 is an equidigital number, since it uses as much as digits as its factorization.

1720143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63718 (or 63712 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1720143 is about 1311.5422219662. The cubic root of 1720143 is about 119.8178486473.

The spelling of 1720143 in words is "one million, seven hundred twenty thousand, one hundred forty-three".