1720142 has 4 divisors (see below), whose sum is σ = 2580216. Its totient is φ = 860070.

The previous prime is 1720133. The next prime is 1720151. The reversal of 1720142 is 2410271.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1720133) and next prime (1720151).

It is a self number, because there is not a number n which added to its sum of digits gives 1720142.

It is a congruent number.

It is an unprimeable number.

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, 430034 + ... + 430037.

It is an arithmetic number, because the mean of its divisors is an integer number (645054).

2^1720142 is an apocalyptic number.

1720142 is a deficient number, since it is larger than the sum of its proper divisors (860074).

1720142 is an equidigital number, since it uses as much as digits as its factorization.

1720142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860073.

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

The square root of 1720142 is about 1311.5418407356. The cubic root of 1720142 is about 119.8178254287.

The spelling of 1720142 in words is "one million, seven hundred twenty thousand, one hundred forty-two".