8965421 has 4 divisors (see below), whose sum is σ = 8971872. Its totient is φ = 8958972.

The previous prime is 8965403. The next prime is 8965447. The reversal of 8965421 is 1245698.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1245698 = 2 ⋅622849.

It is a cyclic number.

It is not a de Polignac number, because 8965421 - 2⁶ = 8965357 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 (8965721) 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, 185 + ... + 4238.

It is an arithmetic number, because the mean of its divisors is an integer number (2242968).

Almost surely, 2^8965421 is an apocalyptic number.

It is an amenable number.

8965421 is a deficient number, since it is larger than the sum of its proper divisors (6451).

8965421 is a wasteful number, since it uses less digits than its factorization.

8965421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450.

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

The square root of 8965421 is about 2994.2312869917. The cubic root of 8965421 is about 207.7416432937.

The spelling of 8965421 in words is "eight million, nine hundred sixty-five thousand, four hundred twenty-one".