82126685 has 4 divisors (see below), whose sum is σ = 98552028. Its totient is φ = 65701344.

The previous prime is 82126669. The next prime is 82126687. The reversal of 82126685 is 58662128.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30946969 + 51179716 = 5563^2 + 7154^2 .

It is a cyclic number.

It is not a de Polignac number, because 82126685 - 2⁴ = 82126669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82126687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8212664 + ... + 8212673.

It is an arithmetic number, because the mean of its divisors is an integer number (24638007).

Almost surely, 2^82126685 is an apocalyptic number.

It is an amenable number.

82126685 is a deficient number, since it is larger than the sum of its proper divisors (16425343).

82126685 is a wasteful number, since it uses less digits than its factorization.

82126685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16425342.

The product of its digits is 46080, while the sum is 38.

The square root of 82126685 is about 9062.3774474472. The cubic root of 82126685 is about 434.6717654245.

The spelling of 82126685 in words is "eighty-two million, one hundred twenty-six thousand, six hundred eighty-five".