105081 has 4 divisors (see below), whose sum is σ = 140112. Its totient is φ = 70052.

The previous prime is 105071. The next prime is 105097. The reversal of 105081 is 180501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180501 = 3 ⋅60167.

It is a cyclic number.

It is not a de Polignac number, because 105081 - 2⁷ = 104953 is a prime.

It is a super-2 number, since 2×105081² = 22084033122, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 105081.

It is not an unprimeable number, because it can be changed into a prime (105031) 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, 17511 + ... + 17516.

It is an arithmetic number, because the mean of its divisors is an integer number (35028).

2¹⁰⁵⁰⁸¹ is an apocalyptic number.

It is an amenable number.

105081 is a deficient number, since it is larger than the sum of its proper divisors (35031).

105081 is an equidigital number, since it uses as much as digits as its factorization.

105081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35030.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 105081 is about 324.1619965388. The cubic root of 105081 is about 47.1890678981.

Adding to 105081 its reverse (180501), we get a palindrome (285582).

The spelling of 105081 in words is "one hundred five thousand, eighty-one".