84220245 has 12 divisors (see below), whose sum is σ = 145981836. Its totient is φ = 44917440.

The previous prime is 84220237. The next prime is 84220247. The reversal of 84220245 is 54202248.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29844369 + 54375876 = 5463^2 + 7374^2 .

It is not a de Polignac number, because 84220245 - 2³ = 84220237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84220247) 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 11 ways as a sum of consecutive naturals, for example, 935736 + ... + 935825.

It is an arithmetic number, because the mean of its divisors is an integer number (12165153).

Almost surely, 2^84220245 is an apocalyptic number.

It is an amenable number.

84220245 is a deficient number, since it is larger than the sum of its proper divisors (61761591).

84220245 is a wasteful number, since it uses less digits than its factorization.

84220245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871572 (or 1871569 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 84220245 is about 9177.1588740743. The cubic root of 84220245 is about 438.3343447025.

The spelling of 84220245 in words is "eighty-four million, two hundred twenty thousand, two hundred forty-five".