10505645 has 4 divisors (see below), whose sum is σ = 12606780. Its totient is φ = 8404512.

The previous prime is 10505639. The next prime is 10505647. The reversal of 10505645 is 54650501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54650501 = 73 ⋅748637.

It can be written as a sum of positive squares in 2 ways, for example, as 1990921 + 8514724 = 1411^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 10505645 - 2¹⁴ = 10489261 is a prime.

It is a super-3 number, since 3×10505645³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505647) 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, 1050560 + ... + 1050569.

It is an arithmetic number, because the mean of its divisors is an integer number (3151695).

Almost surely, 2^10505645 is an apocalyptic number.

It is an amenable number.

10505645 is a deficient number, since it is larger than the sum of its proper divisors (2101135).

10505645 is an equidigital number, since it uses as much as digits as its factorization.

10505645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101134.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 10505645 is about 3241.2412745737. The cubic root of 10505645 is about 219.0151918459.

The spelling of 10505645 in words is "ten million, five hundred five thousand, six hundred forty-five".