8965221 has 4 divisors (see below), whose sum is σ = 11953632. Its totient is φ = 5976812.

The previous prime is 8965217. The next prime is 8965261. The reversal of 8965221 is 1225698.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8965221 - 2² = 8965217 is a prime.

It is a Curzon number.

8965221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8965261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1494201 + ... + 1494206.

It is an arithmetic number, because the mean of its divisors is an integer number (2988408).

Almost surely, 2^8965221 is an apocalyptic number.

It is an amenable number.

8965221 is a deficient number, since it is larger than the sum of its proper divisors (2988411).

8965221 is a wasteful number, since it uses less digits than its factorization.

8965221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988410.

The product of its digits is 8640, while the sum is 33.

The square root of 8965221 is about 2994.1978892518. The cubic root of 8965221 is about 207.7400985201.

The spelling of 8965221 in words is "eight million, nine hundred sixty-five thousand, two hundred twenty-one".