8216945 has 8 divisors (see below), whose sum is σ = 10756800. Its totient is φ = 5975920.

The previous prime is 8216939. The next prime is 8216951. The reversal of 8216945 is 5496128.

It is an interprime number because it is at equal distance from previous prime (8216939) and next prime (8216951).

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

It is not a de Polignac number, because 8216945 - 2¹² = 8212849 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 74645 + ... + 74754.

It is an arithmetic number, because the mean of its divisors is an integer number (1344600).

Almost surely, 2^8216945 is an apocalyptic number.

It is an amenable number.

8216945 is a deficient number, since it is larger than the sum of its proper divisors (2539855).

8216945 is a wasteful number, since it uses less digits than its factorization.

8216945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149415.

The product of its digits is 17280, while the sum is 35.

The square root of 8216945 is about 2866.5214110486. The cubic root of 8216945 is about 201.7917747789.

The spelling of 8216945 in words is "eight million, two hundred sixteen thousand, nine hundred forty-five".