8008421 has 4 divisors (see below), whose sum is σ = 8104992. Its totient is φ = 7911852.

The previous prime is 8008409. The next prime is 8008453. The reversal of 8008421 is 1248008.

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 a de Polignac number, because none of the positive numbers 2^k-8008421 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 (8508421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48161 + ... + 48326.

It is an arithmetic number, because the mean of its divisors is an integer number (2026248).

Almost surely, 2^8008421 is an apocalyptic number.

It is an amenable number.

8008421 is a deficient number, since it is larger than the sum of its proper divisors (96571).

8008421 is an equidigital number, since it uses as much as digits as its factorization.

8008421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96570.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 8008421 is about 2829.9153697593. The cubic root of 8008421 is about 200.0701503917.

The spelling of 8008421 in words is "eight million, eight thousand, four hundred twenty-one".