8105645 has 8 divisors (see below), whose sum is σ = 10062360. Its totient is φ = 6260800.

The previous prime is 8105639. The next prime is 8105653. The reversal of 8105645 is 5465018.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2709316 + 5396329 = 1646^2 + 2323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8105645 - 2¹² = 8101549 is a prime.

It is a super-3 number, since 3×8105645³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27806 + ... + 28095.

It is an arithmetic number, because the mean of its divisors is an integer number (1257795).

Almost surely, 2^8105645 is an apocalyptic number.

It is an amenable number.

8105645 is a deficient number, since it is larger than the sum of its proper divisors (1956715).

8105645 is a wasteful number, since it uses less digits than its factorization.

8105645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55935.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 8105645 is about 2847.0414468356. The cubic root of 8105645 is about 200.8765278824.

The spelling of 8105645 in words is "eight million, one hundred five thousand, six hundred forty-five".