8641145 has 4 divisors (see below), whose sum is σ = 10369380. Its totient is φ = 6912912.

The previous prime is 8641133. The next prime is 8641147. The reversal of 8641145 is 5411468.

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 3717184 + 4923961 = 1928^2 + 2219^2 .

It is a cyclic number.

It is not a de Polignac number, because 8641145 - 2⁸ = 8640889 is a prime.

It is a super-2 number, since 2×8641145² = 149338773822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8641147) 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, 864110 + ... + 864119.

It is an arithmetic number, because the mean of its divisors is an integer number (2592345).

Almost surely, 2^8641145 is an apocalyptic number.

It is an amenable number.

8641145 is a deficient number, since it is larger than the sum of its proper divisors (1728235).

8641145 is a wasteful number, since it uses less digits than its factorization.

8641145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728234.

The product of its digits is 3840, while the sum is 29.

The square root of 8641145 is about 2939.5824533427. The cubic root of 8641145 is about 205.2061776566.

The spelling of 8641145 in words is "eight million, six hundred forty-one thousand, one hundred forty-five".