8669421 has 12 divisors (see below), whose sum is σ = 12554880. Its totient is φ = 5764680.

The previous prime is 8669417. The next prime is 8669443. The reversal of 8669421 is 1249668.

8669421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8669421 - 2² = 8669417 is a prime.

It is a Curzon number.

8669421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8669411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3306 + ... + 5316.

It is an arithmetic number, because the mean of its divisors is an integer number (1046240).

Almost surely, 2^8669421 is an apocalyptic number.

It is an amenable number.

8669421 is a deficient number, since it is larger than the sum of its proper divisors (3885459).

8669421 is a wasteful number, since it uses less digits than its factorization.

8669421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496 (or 2493 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 8669421 is about 2944.3880518709. The cubic root of 8669421 is about 205.4297627015.

The spelling of 8669421 in words is "eight million, six hundred sixty-nine thousand, four hundred twenty-one".