7965221 has 4 divisors (see below), whose sum is σ = 8689344. Its totient is φ = 7241100.

The previous prime is 7965173. The next prime is 7965229. The reversal of 7965221 is 1225697.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1225697 = 11 ⋅111427.

It is a cyclic number.

It is not a de Polignac number, because 7965221 - 2²² = 3770917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7965229) 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 3 ways as a sum of consecutive naturals, for example, 362045 + ... + 362066.

It is an arithmetic number, because the mean of its divisors is an integer number (2172336).

Almost surely, 2^7965221 is an apocalyptic number.

It is an amenable number.

7965221 is a deficient number, since it is larger than the sum of its proper divisors (724123).

7965221 is a wasteful number, since it uses less digits than its factorization.

7965221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724122.

The product of its digits is 7560, while the sum is 32.

The square root of 7965221 is about 2822.2723114540. The cubic root of 7965221 is about 199.7097539900.

The spelling of 7965221 in words is "seven million, nine hundred sixty-five thousand, two hundred twenty-one".