8206145 has 4 divisors (see below), whose sum is σ = 9847380. Its totient is φ = 6564912.

The previous prime is 8206141. The next prime is 8206169. The reversal of 8206145 is 5416028.

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 4787344 + 3418801 = 2188^2 + 1849^2 .

It is a cyclic number.

It is not a de Polignac number, because 8206145 - 2² = 8206141 is a prime.

It is a super-2 number, since 2×8206145² = 134681631522050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8206141) by changing a digit.

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, 820610 + ... + 820619.

It is an arithmetic number, because the mean of its divisors is an integer number (2461845).

Almost surely, 2^8206145 is an apocalyptic number.

It is an amenable number.

8206145 is a deficient number, since it is larger than the sum of its proper divisors (1641235).

8206145 is a wasteful number, since it uses less digits than its factorization.

8206145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641234.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 8206145 is about 2864.6369752553. The cubic root of 8206145 is about 201.7033271997.

The spelling of 8206145 in words is "eight million, two hundred six thousand, one hundred forty-five".