722005 has 8 divisors (see below), whose sum is σ = 871992. Its totient is φ = 573888.

The previous prime is 721997. The next prime is 722011. The reversal of 722005 is 500227.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 485809 + 236196 = 697^2 + 486^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 722005 - 2³ = 721997 is a prime.

It is a Duffinian number.

722005 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 722005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (108999).

2⁷²²⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

722005 is a deficient number, since it is larger than the sum of its proper divisors (149987).

722005 is a wasteful number, since it uses less digits than its factorization.

722005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 722005 is about 849.7087736395. The cubic root of 722005 is about 89.7112142733.

The spelling of 722005 in words is "seven hundred twenty-two thousand, five".