722006 has 4 divisors (see below), whose sum is σ = 1083012. Its totient is φ = 361002.

The previous prime is 721997. The next prime is 722011. The reversal of 722006 is 600227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 600227 = 389 ⋅1543.

It is a congruent number.

It is an unprimeable number.

722006 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180500 + ... + 180503.

It is an arithmetic number, because the mean of its divisors is an integer number (270753).

2⁷²²⁰⁰⁶ is an apocalyptic number.

722006 is a deficient number, since it is larger than the sum of its proper divisors (361006).

722006 is a wasteful number, since it uses less digits than its factorization.

722006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361005.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 722006 is about 849.7093620762. The cubic root of 722006 is about 89.7112556909.

The spelling of 722006 in words is "seven hundred twenty-two thousand, six".