81862 has 12 divisors (see below), whose sum is σ = 136188. Its totient is φ = 36600.

The previous prime is 81853. The next prime is 81869. The reversal of 81862 is 26818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1312 + ... + 1372.

It is an arithmetic number, because the mean of its divisors is an integer number (11349).

2⁸¹⁸⁶² is an apocalyptic number.

81862 is a deficient number, since it is larger than the sum of its proper divisors (54326).

81862 is a wasteful number, since it uses less digits than its factorization.

81862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 74 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 81862 is about 286.1153613492. The cubic root of 81862 is about 43.4204296916.

The spelling of 81862 in words is "eighty-one thousand, eight hundred sixty-two".