726861 has 8 divisors (see below), whose sum is σ = 982720. Its totient is φ = 477792.

The previous prime is 726853. The next prime is 726893. The reversal of 726861 is 168627.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 726861 - 2³ = 726853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 726861.

It is not an unprimeable number, because it can be changed into a 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 in 7 ways as a sum of consecutive naturals, for example, 1441 + ... + 1878.

It is an arithmetic number, because the mean of its divisors is an integer number (122840).

2⁷²⁶⁸⁶¹ is an apocalyptic number.

It is an amenable number.

726861 is a deficient number, since it is larger than the sum of its proper divisors (255859).

726861 is a wasteful number, since it uses less digits than its factorization.

726861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395.

The product of its digits is 4032, while the sum is 30.

The square root of 726861 is about 852.5614347365. The cubic root of 726861 is about 89.9118890753.

The spelling of 726861 in words is "seven hundred twenty-six thousand, eight hundred sixty-one".