726129 has 6 divisors (see below), whose sum is σ = 1048866. Its totient is φ = 484080.

The previous prime is 726109. The next prime is 726137. The reversal of 726129 is 921627.

It can be written as a sum of positive squares in only one way, i.e., 725904 + 225 = 852^2 + 15^2 .

It is not a de Polignac number, because 726129 - 2⁵ = 726097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (726109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40332 + ... + 40349.

It is an arithmetic number, because the mean of its divisors is an integer number (174811).

2⁷²⁶¹²⁹ is an apocalyptic number.

It is an amenable number.

726129 is a deficient number, since it is larger than the sum of its proper divisors (322737).

726129 is a wasteful number, since it uses less digits than its factorization.

726129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80687 (or 80684 counting only the distinct ones).

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

The square root of 726129 is about 852.1320320232. The cubic root of 726129 is about 89.8816964118.

The spelling of 726129 in words is "seven hundred twenty-six thousand, one hundred twenty-nine".