84145205 has 16 divisors (see below), whose sum is σ = 106686720. Its totient is φ = 63534528.

The previous prime is 84145199. The next prime is 84145207. The reversal of 84145205 is 50254148.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84145205 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84145207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26324 + ... + 29346.

It is an arithmetic number, because the mean of its divisors is an integer number (6667920).

Almost surely, 2^84145205 is an apocalyptic number.

It is an amenable number.

84145205 is a deficient number, since it is larger than the sum of its proper divisors (22541515).

84145205 is a wasteful number, since it uses less digits than its factorization.

84145205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 84145205 is about 9173.0695516823. The cubic root of 84145205 is about 438.2041211316.

The spelling of 84145205 in words is "eighty-four million, one hundred forty-five thousand, two hundred five".