82128142 has 4 divisors (see below), whose sum is σ = 123192216. Its totient is φ = 41064070.

The previous prime is 82128133. The next prime is 82128149. The reversal of 82128142 is 24182128.

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

It is a self number, because there is not a number n which added to its sum of digits gives 82128142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82128149) 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 as a sum of consecutive naturals, namely, 20532034 + ... + 20532037.

It is an arithmetic number, because the mean of its divisors is an integer number (30798054).

Almost surely, 2^82128142 is an apocalyptic number.

82128142 is a deficient number, since it is larger than the sum of its proper divisors (41064074).

82128142 is a wasteful number, since it uses less digits than its factorization.

82128142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41064073.

The product of its digits is 2048, while the sum is 28.

The square root of 82128142 is about 9062.4578343847. The cubic root of 82128142 is about 434.6743358964.

The spelling of 82128142 in words is "eighty-two million, one hundred twenty-eight thousand, one hundred forty-two".