724765 has 8 divisors (see below), whose sum is σ = 890208. Its totient is φ = 566160.

The previous prime is 724751. The next prime is 724769. The reversal of 724765 is 567427.

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

It is not a de Polignac number, because 724765 - 2⁵ = 724733 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724769) by changing a digit.

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, 1471 + ... + 1900.

It is an arithmetic number, because the mean of its divisors is an integer number (111276).

2⁷²⁴⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

724765 is a deficient number, since it is larger than the sum of its proper divisors (165443).

724765 is a wasteful number, since it uses less digits than its factorization.

724765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419.

The product of its digits is 11760, while the sum is 31.

The square root of 724765 is about 851.3313103604. The cubic root of 724765 is about 89.8253815883.

The spelling of 724765 in words is "seven hundred twenty-four thousand, seven hundred sixty-five".