729401 has 4 divisors (see below), whose sum is σ = 731172. Its totient is φ = 727632.

The previous prime is 729389. The next prime is 729403. The reversal of 729401 is 104927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104927 = 317 ⋅331.

It can be written as a sum of positive squares in 2 ways, for example, as 89401 + 640000 = 299^2 + 800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (182793).

2⁷²⁹⁴⁰¹ is an apocalyptic number.

It is an amenable number.

729401 is a deficient number, since it is larger than the sum of its proper divisors (1771).

729401 is a wasteful number, since it uses less digits than its factorization.

729401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 729401 is about 854.0497643580. The cubic root of 729401 is about 90.0164990328.

The spelling of 729401 in words is "seven hundred twenty-nine thousand, four hundred one".