724285 has 8 divisors (see below), whose sum is σ = 920376. Its totient is φ = 545280.

The previous prime is 724277. The next prime is 724291. The reversal of 724285 is 582427.

It can be written as a sum of positive squares in 4 ways, for example, as 143641 + 580644 = 379^2 + 762^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 724285 - 2³ = 724277 is a prime.

It is a super-2 number, since 2×724285² = 1049177522450, which contains 22 as substring.

It is a Duffinian number.

724285 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4176 + ... + 4345.

It is an arithmetic number, because the mean of its divisors is an integer number (115047).

2⁷²⁴²⁸⁵ is an apocalyptic number.

It is an amenable number.

724285 is a deficient number, since it is larger than the sum of its proper divisors (196091).

724285 is a wasteful number, since it uses less digits than its factorization.

724285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8543.

The product of its digits is 4480, while the sum is 28.

The square root of 724285 is about 851.0493522705. The cubic root of 724285 is about 89.8055472489.

The spelling of 724285 in words is "seven hundred twenty-four thousand, two hundred eighty-five".