724665 has 8 divisors (see below), whose sum is σ = 1159488. Its totient is φ = 386480.

The previous prime is 724651. The next prime is 724721. The reversal of 724665 is 566427.

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

It is not a de Polignac number, because 724665 - 2⁶ = 724601 is a prime.

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, 24141 + ... + 24170.

It is an arithmetic number, because the mean of its divisors is an integer number (144936).

2⁷²⁴⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

724665 is a deficient number, since it is larger than the sum of its proper divisors (434823).

724665 is a wasteful number, since it uses less digits than its factorization.

724665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48319.

The product of its digits is 10080, while the sum is 30.

The square root of 724665 is about 851.2725767931. The cubic root of 724665 is about 89.8212501566.

The spelling of 724665 in words is "seven hundred twenty-four thousand, six hundred sixty-five".