82121142 has 16 divisors (see below), whose sum is σ = 168062400. Its totient is φ = 26737032.

The previous prime is 82121111. The next prime is 82121147. The reversal of 82121142 is 24112128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82121147) 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, 158892 + ... + 159407.

It is an arithmetic number, because the mean of its divisors is an integer number (10503900).

Almost surely, 2^82121142 is an apocalyptic number.

82121142 is an abundant number, since it is smaller than the sum of its proper divisors (85941258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82121142 is a wasteful number, since it uses less digits than its factorization.

82121142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318347.

The product of its digits is 256, while the sum is 21.

The square root of 82121142 is about 9062.0716174614. The cubic root of 82121142 is about 434.6619860623.

The spelling of 82121142 in words is "eighty-two million, one hundred twenty-one thousand, one hundred forty-two".