84021682 has 8 divisors (see below), whose sum is σ = 126672876. Its totient is φ = 41797392.

The previous prime is 84021673. The next prime is 84021683. The reversal of 84021682 is 28612048.

It can be written as a sum of positive squares in 2 ways, for example, as 82791801 + 1229881 = 9099^2 + 1109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×84021682² = 14119286092218248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84021683) 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, 106233 + ... + 107020.

Almost surely, 2^84021682 is an apocalyptic number.

84021682 is a deficient number, since it is larger than the sum of its proper divisors (42651194).

84021682 is a wasteful number, since it uses less digits than its factorization.

84021682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213452.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 84021682 is about 9166.3341636665. The cubic root of 84021682 is about 437.9895919908.

It can be divided in two parts, 840 and 21682, that added together give a palindrome (22522).

The spelling of 84021682 in words is "eighty-four million, twenty-one thousand, six hundred eighty-two".