726722 has 4 divisors (see below), whose sum is σ = 1090086. Its totient is φ = 363360.

The previous prime is 726707. The next prime is 726751. The reversal of 726722 is 227627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 703921 + 22801 = 839^2 + 151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 726691 and 726700.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181679 + ... + 181682.

2⁷²⁶⁷²² is an apocalyptic number.

726722 is a deficient number, since it is larger than the sum of its proper divisors (363364).

726722 is a wasteful number, since it uses less digits than its factorization.

726722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363363.

The product of its digits is 2352, while the sum is 26.

The square root of 726722 is about 852.4799117868. The cubic root of 726722 is about 89.9061573286.

The spelling of 726722 in words is "seven hundred twenty-six thousand, seven hundred twenty-two".