729061 has 4 divisors (see below), whose sum is σ = 731500. Its totient is φ = 726624.

The previous prime is 729059. The next prime is 729073. The reversal of 729061 is 160927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160927 = 13 ⋅12379.

It can be written as a sum of positive squares in 2 ways, for example, as 592900 + 136161 = 770^2 + 369^2 .

It is a 3-Lehmer number, since φ(729061) divides (729061-1)³.

It is a cyclic number.

It is not a de Polignac number, because 729061 - 2¹ = 729059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696 + ... + 1393.

It is an arithmetic number, because the mean of its divisors is an integer number (182875).

It is a Poulet number, since it divides 2⁷²⁹⁰⁶⁰-1.

2⁷²⁹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

729061 is a deficient number, since it is larger than the sum of its proper divisors (2439).

729061 is a wasteful number, since it uses less digits than its factorization.

729061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 729061 is about 853.8506895236. The cubic root of 729061 is about 90.0025102181.

Adding to 729061 its reverse (160927), we get a palindrome (889988).

The spelling of 729061 in words is "seven hundred twenty-nine thousand, sixty-one".