84256945 has 4 divisors (see below), whose sum is σ = 101108340. Its totient is φ = 67405552.

The previous prime is 84256937. The next prime is 84256969. The reversal of 84256945 is 54965248.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25090081 + 59166864 = 5009^2 + 7692^2 .

It is a cyclic number.

It is not a de Polignac number, because 84256945 - 2³ = 84256937 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8425690 + ... + 8425699.

It is an arithmetic number, because the mean of its divisors is an integer number (25277085).

Almost surely, 2^84256945 is an apocalyptic number.

It is an amenable number.

84256945 is a deficient number, since it is larger than the sum of its proper divisors (16851395).

84256945 is a wasteful number, since it uses less digits than its factorization.

84256945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16851394.

The product of its digits is 345600, while the sum is 43.

The square root of 84256945 is about 9179.1581858033. The cubic root of 84256945 is about 438.3980053039.

The spelling of 84256945 in words is "eighty-four million, two hundred fifty-six thousand, nine hundred forty-five".