8821345 has 16 divisors (see below), whose sum is σ = 11510352. Its totient is φ = 6451200.

The previous prime is 8821343. The next prime is 8821349. The reversal of 8821345 is 5431288.

It can be written as a sum of positive squares in 8 ways, for example, as 5958481 + 2862864 = 2441^2 + 1692^2 .

It is not a de Polignac number, because 8821345 - 2¹ = 8821343 is a prime.

It is a super-2 number, since 2×8821345² = 155632255218050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8821343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6745 + ... + 7945.

It is an arithmetic number, because the mean of its divisors is an integer number (719397).

Almost surely, 2^8821345 is an apocalyptic number.

It is an amenable number.

8821345 is a deficient number, since it is larger than the sum of its proper divisors (2689007).

8821345 is a wasteful number, since it uses less digits than its factorization.

8821345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its digits is 7680, while the sum is 31.

The square root of 8821345 is about 2970.0749148801. The cubic root of 8821345 is about 206.6228126975.

The spelling of 8821345 in words is "eight million, eight hundred twenty-one thousand, three hundred forty-five".