724581 has 24 divisors (see below), whose sum is σ = 1231776. Its totient is φ = 404640.

The previous prime is 724573. The next prime is 724583. The reversal of 724581 is 185427.

724581 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 724581 - 2³ = 724573 is a prime.

It is a super-2 number, since 2×724581² = 1050035251122, which contains 22 as substring.

724581 is strictly pandigital in base 7.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006 + ... + 1568.

It is an arithmetic number, because the mean of its divisors is an integer number (51324).

2⁷²⁴⁵⁸¹ is an apocalyptic number.

It is an amenable number.

724581 is a deficient number, since it is larger than the sum of its proper divisors (507195).

724581 is a wasteful number, since it uses less digits than its factorization.

724581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 590 counting only the distinct ones).

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

The square root of 724581 is about 851.2232374648. The cubic root of 724581 is about 89.8177794602.

The spelling of 724581 in words is "seven hundred twenty-four thousand, five hundred eighty-one".