726761 has 8 divisors (see below), whose sum is σ = 848640. Its totient is φ = 609684.

The previous prime is 726751. The next prime is 726779. The reversal of 726761 is 167627.

It is not a de Polignac number, because 726761 - 2⁶ = 726697 is a prime.

It is a super-2 number, since 2×726761² = 1056363102242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726701) 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, 15440 + ... + 15486.

It is an arithmetic number, because the mean of its divisors is an integer number (106080).

2⁷²⁶⁷⁶¹ is an apocalyptic number.

It is an amenable number.

726761 is a deficient number, since it is larger than the sum of its proper divisors (121879).

726761 is an frugal number, since it uses more digits than its factorization.

726761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 54 counting only the distinct ones).

The product of its digits is 3528, while the sum is 29.

The square root of 726761 is about 852.5027859192. The cubic root of 726761 is about 89.9077655903.

The spelling of 726761 in words is "seven hundred twenty-six thousand, seven hundred sixty-one".