723285 has 12 divisors (see below), whose sum is σ = 1253772. Its totient is φ = 385728.

The previous prime is 723271. The next prime is 723287. The reversal of 723285 is 582327.

It can be written as a sum of positive squares in 2 ways, for example, as 191844 + 531441 = 438^2 + 729^2 .

It is not a de Polignac number, because 723285 - 2⁴ = 723269 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7992 + ... + 8081.

It is an arithmetic number, because the mean of its divisors is an integer number (104481).

2⁷²³²⁸⁵ is an apocalyptic number.

It is an amenable number.

723285 is a deficient number, since it is larger than the sum of its proper divisors (530487).

723285 is a wasteful number, since it uses less digits than its factorization.

723285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16084 (or 16081 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 723285 is about 850.4616393465. The cubic root of 723285 is about 89.7641975455.

The spelling of 723285 in words is "seven hundred twenty-three thousand, two hundred eighty-five".