1720612 has 12 divisors (see below), whose sum is σ = 3020976. Its totient is φ = 857480.

The previous prime is 1720603. The next prime is 1720613. The reversal of 1720612 is 2160271.

It is a self number, because there is not a number n which added to its sum of digits gives 1720612.

It is not an unprimeable number, because it can be changed into a prime (1720613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287 + ... + 2257.

It is an arithmetic number, because the mean of its divisors is an integer number (251748).

2^1720612 is an apocalyptic number.

It is an amenable number.

1720612 is a deficient number, since it is larger than the sum of its proper divisors (1300364).

1720612 is a wasteful number, since it uses less digits than its factorization.

1720612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1720612 is about 1311.7210069218. The cubic root of 1720612 is about 119.8287371731.

Adding to 1720612 its reverse (2160271), we get a palindrome (3880883).

It can be divided in two parts, 1720 and 612, that added together give a palindrome (2332).

The spelling of 1720612 in words is "one million, seven hundred twenty thousand, six hundred twelve".