84042445 has 8 divisors (see below), whose sum is σ = 102504600. Its totient is φ = 66131520.

The previous prime is 84042443. The next prime is 84042451. The reversal of 84042445 is 54424048.

It can be written as a sum of positive squares in 4 ways, for example, as 5134756 + 78907689 = 2266^2 + 8883^2 .

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

It is not a de Polignac number, because 84042445 - 2¹ = 84042443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84042443) 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, 137470 + ... + 138079.

It is an arithmetic number, because the mean of its divisors is an integer number (12813075).

Almost surely, 2^84042445 is an apocalyptic number.

It is an amenable number.

84042445 is a deficient number, since it is larger than the sum of its proper divisors (18462155).

84042445 is a wasteful number, since it uses less digits than its factorization.

84042445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275615.

The product of its (nonzero) digits is 20480, while the sum is 31.

The square root of 84042445 is about 9167.4666620610. The cubic root of 84042445 is about 438.0256669209.

The spelling of 84042445 in words is "eighty-four million, forty-two thousand, four hundred forty-five".