726291 has 24 divisors (see below), whose sum is σ = 1145664. Its totient is φ = 441600.

The previous prime is 726289. The next prime is 726301. The reversal of 726291 is 192627.

It is not a de Polignac number, because 726291 - 2¹ = 726289 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

Its product of digits (1512) is a multiple of the sum of its prime divisors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7141 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (47736).

2⁷²⁶²⁹¹ is an apocalyptic number.

726291 is a deficient number, since it is larger than the sum of its proper divisors (419373).

726291 is a wasteful number, since it uses less digits than its factorization.

726291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 168 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 726291 is about 852.2270824141. The cubic root of 726291 is about 89.8883801425. Note that the first 3 decimals are identical.

The spelling of 726291 in words is "seven hundred twenty-six thousand, two hundred ninety-one".