84109142 has 16 divisors (see below), whose sum is σ = 136588032. Its totient is φ = 38614080.

The previous prime is 84109127. The next prime is 84109147. The reversal of 84109142 is 24190148.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84109147) 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 7 ways as a sum of consecutive naturals, for example, 3503 + ... + 13434.

It is an arithmetic number, because the mean of its divisors is an integer number (8536752).

Almost surely, 2^84109142 is an apocalyptic number.

84109142 is a deficient number, since it is larger than the sum of its proper divisors (52478890).

84109142 is a wasteful number, since it uses less digits than its factorization.

84109142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17143.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 84109142 is about 9171.1036413291. The cubic root of 84109142 is about 438.1415102620.

The spelling of 84109142 in words is "eighty-four million, one hundred nine thousand, one hundred forty-two".