105539 has 4 divisors (see below), whose sum is σ = 120624. Its totient is φ = 90456.

The previous prime is 105533. The next prime is 105541. The reversal of 105539 is 935501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105539 is a prime.

It is a super-2 number, since 2×105539² = 22276961042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105533) 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, 7532 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (30156).

2¹⁰⁵⁵³⁹ is an apocalyptic number.

105539 is a deficient number, since it is larger than the sum of its proper divisors (15085).

105539 is an equidigital number, since it uses as much as digits as its factorization.

105539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15084.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 105539 is about 324.8676653655. The cubic root of 105539 is about 47.2575270522.

The spelling of 105539 in words is "one hundred five thousand, five hundred thirty-nine".