8320545 has 12 divisors (see below), whose sum is σ = 14422356. Its totient is φ = 4437600.

The previous prime is 8320541. The next prime is 8320547. The reversal of 8320545 is 5450238.

It can be written as a sum of positive squares in 2 ways, for example, as 6640929 + 1679616 = 2577^2 + 1296^2 .

It is not a de Polignac number, because 8320545 - 2² = 8320541 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8320541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92406 + ... + 92495.

It is an arithmetic number, because the mean of its divisors is an integer number (1201863).

Almost surely, 2^8320545 is an apocalyptic number.

It is an amenable number.

8320545 is a deficient number, since it is larger than the sum of its proper divisors (6101811).

8320545 is a wasteful number, since it uses less digits than its factorization.

8320545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184912 (or 184909 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 8320545 is about 2884.5354912013. The cubic root of 8320545 is about 202.6363051216.

It can be divided in two parts, 83205 and 45, that multiplied together give a square (3744225 = 1935²).

The spelling of 8320545 in words is "eight million, three hundred twenty thousand, five hundred forty-five".