8219145 has 32 divisors (see below), whose sum is σ = 14509440. Its totient is φ = 3939840.

The previous prime is 8219137. The next prime is 8219171. The reversal of 8219145 is 5419128.

It is a happy number.

It is not a de Polignac number, because 8219145 - 2³ = 8219137 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17757 + ... + 18213.

It is an arithmetic number, because the mean of its divisors is an integer number (453420).

Almost surely, 2^8219145 is an apocalyptic number.

It is an amenable number.

8219145 is a deficient number, since it is larger than the sum of its proper divisors (6290295).

8219145 is a wasteful number, since it uses less digits than its factorization.

8219145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585.

The product of its digits is 2880, while the sum is 30.

The square root of 8219145 is about 2866.9051257410. The cubic root of 8219145 is about 201.8097823754.

The spelling of 8219145 in words is "eight million, two hundred nineteen thousand, one hundred forty-five".