724518 has 16 divisors (see below), whose sum is σ = 1610160. Its totient is φ = 241488.

The previous prime is 724517. The next prime is 724519. The reversal of 724518 is 815427.

It is an interprime number because it is at equal distance from previous prime (724517) and next prime (724519).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 724491 and 724500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6655 + ... + 6762.

It is an arithmetic number, because the mean of its divisors is an integer number (100635).

2⁷²⁴⁵¹⁸ is an apocalyptic number.

724518 is an abundant number, since it is smaller than the sum of its proper divisors (885642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

724518 is a wasteful number, since it uses less digits than its factorization.

724518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13428 (or 13422 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 724518 is about 851.1862310916. The cubic root of 724518 is about 89.8151762619.

Subtracting 724518 from its reverse (815427), we obtain a palindrome (90909).

The spelling of 724518 in words is "seven hundred twenty-four thousand, five hundred eighteen".