84142145 has 8 divisors (see below), whose sum is σ = 101042856. Its totient is φ = 67265536.

The previous prime is 84142133. The next prime is 84142187. The reversal of 84142145 is 54124148.

It can be written as a sum of positive squares in 4 ways, for example, as 16507969 + 67634176 = 4063^2 + 8224^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 84142145 - 2⁶ = 84142081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2849 + ... + 13281.

It is an arithmetic number, because the mean of its divisors is an integer number (12630357).

Almost surely, 2^84142145 is an apocalyptic number.

It is an amenable number.

84142145 is a deficient number, since it is larger than the sum of its proper divisors (16900711).

84142145 is a wasteful number, since it uses less digits than its factorization.

84142145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12051.

The product of its digits is 5120, while the sum is 29.

The square root of 84142145 is about 9172.9027575790. The cubic root of 84142145 is about 438.1988091994.

The spelling of 84142145 in words is "eighty-four million, one hundred forty-two thousand, one hundred forty-five".