723042 has 12 divisors (see below), whose sum is σ = 1566630. Its totient is φ = 241008.

The previous prime is 723031. The next prime is 723043. The reversal of 723042 is 240327.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 408321 + 314721 = 639^2 + 561^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 40169 = 723042 / (7 + 2 + 3 + 0 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (723043) by changing a digit.

723042 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 (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20067 + ... + 20102.

2⁷²³⁰⁴² is an apocalyptic number.

723042 is an abundant number, since it is smaller than the sum of its proper divisors (843588).

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

723042 is a wasteful number, since it uses less digits than its factorization.

723042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40177 (or 40174 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 723042 is about 850.3187637586. The cubic root of 723042 is about 89.7541438123.

Adding to 723042 its reverse (240327), we get a palindrome (963369).

It can be divided in two parts, 72 and 3042, that multiplied together give a square (219024 = 468²).

The spelling of 723042 in words is "seven hundred twenty-three thousand, forty-two", and thus it is an iban number.