105442 has 4 divisors (see below), whose sum is σ = 158166. Its totient is φ = 52720.

The previous prime is 105437. The next prime is 105449. The reversal of 105442 is 244501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244501 = 139 ⋅1759.

It can be written as a sum of positive squares in only one way, i.e., 103041 + 2401 = 321^2 + 49^2 .

It is a super-2 number, since 2×105442² = 22236030728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26359 + ... + 26362.

2¹⁰⁵⁴⁴² is an apocalyptic number.

105442 is a deficient number, since it is larger than the sum of its proper divisors (52724).

105442 is an equidigital number, since it uses as much as digits as its factorization.

105442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52723.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 105442 is about 324.7183394882. The cubic root of 105442 is about 47.2430446169.

Adding to 105442 its reverse (244501), we get a palindrome (349943).

The spelling of 105442 in words is "one hundred five thousand, four hundred forty-two".