80081 has 4 divisors (see below), whose sum is σ = 81252. Its totient is φ = 78912.

The previous prime is 80077. The next prime is 80107. The reversal of 80081 is 18008.

It is a happy number.

80081 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

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 33856 + 46225 = 184^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 80081 - 2² = 80077 is a prime.

It is a super-2 number, since 2×80081² = 12825933122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80021) 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, 476 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (20313).

2⁸⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

80081 is a deficient number, since it is larger than the sum of its proper divisors (1171).

80081 is a wasteful number, since it uses less digits than its factorization.

80081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 80081 is about 282.9858653714. The cubic root of 80081 is about 43.1032313295.

Adding to 80081 its reverse (18008), we get a palindrome (98089).

The spelling of 80081 in words is "eighty thousand, eighty-one".