721794 has 8 divisors (see below), whose sum is σ = 1443600. Its totient is φ = 240596.

The previous prime is 721793. The next prime is 721843. The reversal of 721794 is 497127.

It is a sphenic number, since it is the product of 3 distinct primes.

721794 is an admirable number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (721793) 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, 60144 + ... + 60155.

It is an arithmetic number, because the mean of its divisors is an integer number (180450).

2⁷²¹⁷⁹⁴ is an apocalyptic number.

721794 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721794 is a wasteful number, since it uses less digits than its factorization.

721794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120304.

The product of its digits is 3528, while the sum is 30.

The square root of 721794 is about 849.5846043803. The cubic root of 721794 is about 89.7024743013.

The spelling of 721794 in words is "seven hundred twenty-one thousand, seven hundred ninety-four".