724542 has 32 divisors (see below), whose sum is σ = 1784832. Its totient is φ = 190944.

The previous prime is 724531. The next prime is 724547. The reversal of 724542 is 245427.

It is a super-2 number, since 2×724542² = 1049922219528, which contains 22 as substring.

It is a d-powerful number, because it can be written as 7⁶ + 2⁷ + 5⁷ + 4⁴ + 4⁶ + 2¹⁹ .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 724542.

It is not an unprimeable number, because it can be changed into a prime (724547) by changing a digit.

724542 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 15 ways as a sum of consecutive naturals, for example, 118 + ... + 1209.

It is an arithmetic number, because the mean of its divisors is an integer number (55776).

2⁷²⁴⁵⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 724542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (892416).

724542 is an abundant number, since it is smaller than the sum of its proper divisors (1060290).

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

724542 is a wasteful number, since it uses less digits than its factorization.

724542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352.

The product of its digits is 2240, while the sum is 24.

The square root of 724542 is about 851.2003289473. The cubic root of 724542 is about 89.8161679743.

Adding to 724542 its reverse (245427), we get a palindrome (969969).

The spelling of 724542 in words is "seven hundred twenty-four thousand, five hundred forty-two".