82142681 has 8 divisors (see below), whose sum is σ = 86829600. Its totient is φ = 77492160.

The previous prime is 82142677. The next prime is 82142689. The reversal of 82142681 is 18624128.

It is a happy number.

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 82142681 - 2² = 82142677 is a prime.

It is a super-2 number, since 2×82142681² = 13494840083735522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82142689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4391 + ... + 13548.

It is an arithmetic number, because the mean of its divisors is an integer number (10853700).

Almost surely, 2^82142681 is an apocalyptic number.

It is an amenable number.

82142681 is a deficient number, since it is larger than the sum of its proper divisors (4686919).

82142681 is a wasteful number, since it uses less digits than its factorization.

82142681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18199.

The product of its digits is 6144, while the sum is 32.

The square root of 82142681 is about 9063.2599543431. The cubic root of 82142681 is about 434.6999842598.

The spelling of 82142681 in words is "eighty-two million, one hundred forty-two thousand, six hundred eighty-one".