1720072 has 16 divisors (see below), whose sum is σ = 3243600. Its totient is φ = 855120.

The previous prime is 1720063. The next prime is 1720109. The reversal of 1720072 is 2700271.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179 + ... + 2197.

It is an arithmetic number, because the mean of its divisors is an integer number (202725).

2^1720072 is an apocalyptic number.

It is an amenable number.

1720072 is a deficient number, since it is larger than the sum of its proper divisors (1523528).

1720072 is a wasteful number, since it uses less digits than its factorization.

1720072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 1720072 is about 1311.5151543158. The cubic root of 1720072 is about 119.8162001052.

The spelling of 1720072 in words is "one million, seven hundred twenty thousand, seventy-two".