73442 has 4 divisors (see below), whose sum is σ = 110166. Its totient is φ = 36720.

The previous prime is 73433. The next prime is 73453. The reversal of 73442 is 24437.

It is a happy number.

It is a Cunningham number, because it is equal to 271²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24437 = 7 ⋅3491.

It can be written as a sum of positive squares in only one way, i.e., 73441 + 1 = 271^2 + 1^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 73442.

It is an unprimeable number.

73442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18359 + ... + 18362.

2⁷³⁴⁴² is an apocalyptic number.

73442 is a deficient number, since it is larger than the sum of its proper divisors (36724).

73442 is a wasteful number, since it uses less digits than its factorization.

73442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36723.

The product of its digits is 672, while the sum is 20.

The square root of 73442 is about 271.0018450122. The cubic root of 73442 is about 41.8775724268.

Adding to 73442 its reverse (24437), we get a palindrome (97879).

It can be divided in two parts, 73 and 442, that added together give a palindrome (515).

The spelling of 73442 in words is "seventy-three thousand, four hundred forty-two", and thus it is an iban number.