8549945 has 4 divisors (see below), whose sum is σ = 10259940. Its totient is φ = 6839952.

The previous prime is 8549941. The next prime is 8549969. The reversal of 8549945 is 5499458.

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 3041536 + 5508409 = 1744^2 + 2347^2 .

It is a cyclic number.

It is not a de Polignac number, because 8549945 - 2² = 8549941 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8549896 and 8549905.

It is not an unprimeable number, because it can be changed into a prime (8549941) 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, 854990 + ... + 854999.

It is an arithmetic number, because the mean of its divisors is an integer number (2564985).

Almost surely, 2^8549945 is an apocalyptic number.

It is an amenable number.

8549945 is a deficient number, since it is larger than the sum of its proper divisors (1709995).

8549945 is a wasteful number, since it uses less digits than its factorization.

8549945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709994.

The product of its digits is 259200, while the sum is 44.

The square root of 8549945 is about 2924.0288986260. The cubic root of 8549945 is about 204.4816968214.

The spelling of 8549945 in words is "eight million, five hundred forty-nine thousand, nine hundred forty-five".