8122645 has 4 divisors (see below), whose sum is σ = 9747180. Its totient is φ = 6498112.

The previous prime is 8122643. The next prime is 8122649. The reversal of 8122645 is 5462218.

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 4401604 + 3721041 = 2098^2 + 1929^2 .

It is a cyclic number.

It is not a de Polignac number, because 8122645 - 2¹ = 8122643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8122643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812260 + ... + 812269.

It is an arithmetic number, because the mean of its divisors is an integer number (2436795).

Almost surely, 2^8122645 is an apocalyptic number.

It is an amenable number.

8122645 is a deficient number, since it is larger than the sum of its proper divisors (1624535).

8122645 is a wasteful number, since it uses less digits than its factorization.

8122645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624534.

The product of its digits is 3840, while the sum is 28.

The square root of 8122645 is about 2850.0254384830. The cubic root of 8122645 is about 201.0168628543.

The spelling of 8122645 in words is "eight million, one hundred twenty-two thousand, six hundred forty-five".