105942505 has 4 divisors (see below), whose sum is σ = 127131012. Its totient is φ = 84754000.

The previous prime is 105942457. The next prime is 105942547. The reversal of 105942505 is 505249501.

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 73770921 + 32171584 = 8589^2 + 5672^2 .

It is not a de Polignac number, because 105942505 - 2¹³ = 105934313 is a prime.

It is a super-2 number, since 2×105942505² = 22447628731350050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10594246 + ... + 10594255.

It is an arithmetic number, because the mean of its divisors is an integer number (31782753).

Almost surely, 2^105942505 is an apocalyptic number.

It is an amenable number.

105942505 is a deficient number, since it is larger than the sum of its proper divisors (21188507).

105942505 is an equidigital number, since it uses as much as digits as its factorization.

105942505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21188506.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 105942505 is about 10292.8375582247. The cubic root of 105942505 is about 473.1767669154.

The spelling of 105942505 in words is "one hundred five million, nine hundred forty-two thousand, five hundred five".