105665045 has 4 divisors (see below), whose sum is σ = 126798060. Its totient is φ = 84532032.

The previous prime is 105665041. The next prime is 105665129. The reversal of 105665045 is 540566501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540566501 = 569 ⋅950029.

It can be written as a sum of positive squares in 2 ways, for example, as 62078641 + 43586404 = 7879^2 + 6602^2 .

It is a cyclic number.

It is not a de Polignac number, because 105665045 - 2² = 105665041 is a prime.

It is a super-2 number, since 2×105665045² = 22330203469704050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105665041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10566500 + ... + 10566509.

It is an arithmetic number, because the mean of its divisors is an integer number (31699515).

Almost surely, 2^105665045 is an apocalyptic number.

It is an amenable number.

105665045 is a deficient number, since it is larger than the sum of its proper divisors (21133015).

105665045 is an equidigital number, since it uses as much as digits as its factorization.

105665045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21133014.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 105665045 is about 10279.3504172200. The cubic root of 105665045 is about 472.7633275519.

The spelling of 105665045 in words is "one hundred five million, six hundred sixty-five thousand, forty-five".