81076 has 6 divisors (see below), whose sum is σ = 141890. Its totient is φ = 40536.

The previous prime is 81071. The next prime is 81077. The reversal of 81076 is 67018.

It can be written as a sum of positive squares in only one way, i.e., 76176 + 4900 = 276^2 + 70^2 .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81071) by changing a digit.

81076 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10131 + ... + 10138.

2⁸¹⁰⁷⁶ is an apocalyptic number.

It is an amenable number.

81076 is a deficient number, since it is larger than the sum of its proper divisors (60814).

81076 is a wasteful number, since it uses less digits than its factorization.

81076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20273 (or 20271 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 81076 is about 284.7384765008. The cubic root of 81076 is about 43.2810150973.

The spelling of 81076 in words is "eighty-one thousand, seventy-six".