8449745 has 8 divisors (see below), whose sum is σ = 10184616. Its totient is φ = 6729856.

The previous prime is 8449729. The next prime is 8449747. The reversal of 8449745 is 5479448.

It can be written as a sum of positive squares in 4 ways, for example, as 654481 + 7795264 = 809^2 + 2792^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8449745 - 2⁴ = 8449729 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8449747) 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 7 ways as a sum of consecutive naturals, for example, 2462 + ... + 4791.

It is an arithmetic number, because the mean of its divisors is an integer number (1273077).

Almost surely, 2^8449745 is an apocalyptic number.

It is an amenable number.

8449745 is a deficient number, since it is larger than the sum of its proper divisors (1734871).

8449745 is a wasteful number, since it uses less digits than its factorization.

8449745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7491.

The product of its digits is 161280, while the sum is 41.

The square root of 8449745 is about 2906.8445090854. The cubic root of 8449745 is about 203.6797567340.

The spelling of 8449745 in words is "eight million, four hundred forty-nine thousand, seven hundred forty-five".