84427145 has 24 divisors (see below), whose sum is σ = 113504328. Its totient is φ = 60220160.

The previous prime is 84427141. The next prime is 84427153. The reversal of 84427145 is 54172448.

It can be written as a sum of positive squares in 4 ways, for example, as 5234944 + 79192201 = 2288^2 + 8899^2 .

It is not a de Polignac number, because 84427145 - 2² = 84427141 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84427141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30749 + ... + 33381.

It is an arithmetic number, because the mean of its divisors is an integer number (4729347).

Almost surely, 2^84427145 is an apocalyptic number.

It is an amenable number.

84427145 is a deficient number, since it is larger than the sum of its proper divisors (29077183).

84427145 is a wasteful number, since it uses less digits than its factorization.

84427145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2702 counting only the distinct ones).

The product of its digits is 35840, while the sum is 35.

The square root of 84427145 is about 9188.4245113077. The cubic root of 84427145 is about 438.6929964389.

The spelling of 84427145 in words is "eighty-four million, four hundred twenty-seven thousand, one hundred forty-five".