1720994 has 16 divisors (see below), whose sum is σ = 2841696. Its totient is φ = 775200.

The previous prime is 1720991. The next prime is 1721003. The reversal of 1720994 is 4990271.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1720994.

It is not an unprimeable number, because it can be changed into a prime (1720991) 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, 2729 + ... + 3299.

It is an arithmetic number, because the mean of its divisors is an integer number (177606).

2^1720994 is an apocalyptic number.

1720994 is a deficient number, since it is larger than the sum of its proper divisors (1120702).

1720994 is a wasteful number, since it uses less digits than its factorization.

1720994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1720994 is about 1311.8666090727. The cubic root of 1720994 is about 119.8376044038.

The spelling of 1720994 in words is "one million, seven hundred twenty thousand, nine hundred ninety-four".