73521442 has 16 divisors (see below), whose sum is σ = 115678080. Its totient is φ = 35004528.

The previous prime is 73521433. The next prime is 73521449. The reversal of 73521442 is 24412537.

It is a self number, because there is not a number n which added to its sum of digits gives 73521442.

It is not an unprimeable number, because it can be changed into a prime (73521449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7092 + ... + 14047.

It is an arithmetic number, because the mean of its divisors is an integer number (7229880).

Almost surely, 2^73521442 is an apocalyptic number.

73521442 is a deficient number, since it is larger than the sum of its proper divisors (42156638).

73521442 is a wasteful number, since it uses less digits than its factorization.

73521442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21225.

The product of its digits is 6720, while the sum is 28.

The square root of 73521442 is about 8574.4645313862. The cubic root of 73521442 is about 418.9266660219.

Adding to 73521442 its reverse (24412537), we get a palindrome (97933979).

The spelling of 73521442 in words is "seventy-three million, five hundred twenty-one thousand, four hundred forty-two".