726742 has 4 divisors (see below), whose sum is σ = 1090116. Its totient is φ = 363370.

The previous prime is 726707. The next prime is 726751. The reversal of 726742 is 247627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247627 = 19 ⋅13033.

It is a self number, because there is not a number n which added to its sum of digits gives 726742.

It is a congruent number.

It is an unprimeable number.

726742 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181684 + ... + 181687.

It is an arithmetic number, because the mean of its divisors is an integer number (272529).

2⁷²⁶⁷⁴² is an apocalyptic number.

726742 is a deficient number, since it is larger than the sum of its proper divisors (363374).

726742 is a wasteful number, since it uses less digits than its factorization.

726742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363373.

The product of its digits is 4704, while the sum is 28.

The square root of 726742 is about 852.4916421878. The cubic root of 726742 is about 89.9069820854.

The spelling of 726742 in words is "seven hundred twenty-six thousand, seven hundred forty-two".