726841 has 2 divisors, whose sum is σ = 726842. Its totient is φ = 726840.

The previous prime is 726839. The next prime is 726853. The reversal of 726841 is 148627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 570025 + 156816 = 755^2 + 396^2 .

It is an emirp because it is prime and its reverse (148627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 726841 - 2¹ = 726839 is a prime.

Together with 726839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (726811) by changing a digit.

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, 363420 + 363421.

It is an arithmetic number, because the mean of its divisors is an integer number (363421).

2⁷²⁶⁸⁴¹ is an apocalyptic number.

It is an amenable number.

726841 is a deficient number, since it is larger than the sum of its proper divisors (1).

726841 is an equidigital number, since it uses as much as digits as its factorization.

726841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 28.

The square root of 726841 is about 852.5497052958. The cubic root of 726841 is about 89.9110644086.

The spelling of 726841 in words is "seven hundred twenty-six thousand, eight hundred forty-one".