723522 has 8 divisors (see below), whose sum is σ = 1447056. Its totient is φ = 241172.

The previous prime is 723493. The next prime is 723529. The reversal of 723522 is 225327.

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

723522 is an admirable number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (723529) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 60288 + ... + 60299.

It is an arithmetic number, because the mean of its divisors is an integer number (180882).

2⁷²³⁵²² is an apocalyptic number.

723522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

723522 is a wasteful number, since it uses less digits than its factorization.

723522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120592.

The product of its digits is 840, while the sum is 21.

The square root of 723522 is about 850.6009640248. The cubic root of 723522 is about 89.7740008695.

Adding to 723522 its reverse (225327), we get a palindrome (948849).

The spelling of 723522 in words is "seven hundred twenty-three thousand, five hundred twenty-two".