723105 has 12 divisors (see below), whose sum is σ = 1253460. Its totient is φ = 385632.

The previous prime is 723103. The next prime is 723109. The reversal of 723105 is 501327.

It can be written as a sum of positive squares in 2 ways, for example, as 221841 + 501264 = 471^2 + 708^2 .

It is not a de Polignac number, because 723105 - 2¹ = 723103 is a prime.

723105 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 723105.

It is not an unprimeable number, because it can be changed into a prime (723101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7990 + ... + 8079.

It is an arithmetic number, because the mean of its divisors is an integer number (104455).

2⁷²³¹⁰⁵ is an apocalyptic number.

It is an amenable number.

723105 is a deficient number, since it is larger than the sum of its proper divisors (530355).

723105 is a wasteful number, since it uses less digits than its factorization.

723105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16080 (or 16077 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 723105 is about 850.3558078828. The cubic root of 723105 is about 89.7567505520.

It can be divided in two parts, 723 and 105, that added together give a palindrome (828).

The spelling of 723105 in words is "seven hundred twenty-three thousand, one hundred five".