84442 has 4 divisors (see below), whose sum is σ = 126666. Its totient is φ = 42220.

The previous prime is 84437. The next prime is 84443. The reversal of 84442 is 24448.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47961 + 36481 = 219^2 + 191^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (84443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21109 + ... + 21112.

2⁸⁴⁴⁴² is an apocalyptic number.

84442 is a deficient number, since it is larger than the sum of its proper divisors (42224).

84442 is a wasteful number, since it uses less digits than its factorization.

84442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42223.

The product of its digits is 1024, while the sum is 22.

The square root of 84442 is about 290.5890569172. The cubic root of 84442 is about 43.8718724350.

It can be divided in two parts, 84 and 442, that multiplied together give a triangular number (37128 = T₂₇₂).

The spelling of 84442 in words is "eighty-four thousand, four hundred forty-two".