82142643 has 16 divisors (see below), whose sum is σ = 125769600. Its totient is φ = 47162880.

The previous prime is 82142629. The next prime is 82142651. The reversal of 82142643 is 34624128.

It is not a de Polignac number, because 82142643 - 2⁶ = 82142579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82142643.

It is not an unprimeable number, because it can be changed into a prime (82142663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64878 + ... + 66131.

It is an arithmetic number, because the mean of its divisors is an integer number (7860600).

Almost surely, 2^82142643 is an apocalyptic number.

82142643 is a deficient number, since it is larger than the sum of its proper divisors (43626957).

82142643 is a wasteful number, since it uses less digits than its factorization.

82142643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131042.

The product of its digits is 9216, while the sum is 30.

The square root of 82142643 is about 9063.2578579670. The cubic root of 82142643 is about 434.6999172276.

The spelling of 82142643 in words is "eighty-two million, one hundred forty-two thousand, six hundred forty-three".