8003421 has 16 divisors (see below), whose sum is σ = 11901120. Its totient is φ = 5315760.

The previous prime is 8003419. The next prime is 8003423. The reversal of 8003421 is 1243008.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8003419) and next prime (8003423).

It is not a de Polignac number, because 8003421 - 2¹ = 8003419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8003394 and 8003403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8003423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12126 + ... + 12768.

It is an arithmetic number, because the mean of its divisors is an integer number (743820).

Almost surely, 2^8003421 is an apocalyptic number.

It is an amenable number.

8003421 is a deficient number, since it is larger than the sum of its proper divisors (3897699).

8003421 is a wasteful number, since it uses less digits than its factorization.

8003421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 8003421 is about 2829.0318131827. The cubic root of 8003421 is about 200.0285042707.

Adding to 8003421 its reverse (1243008), we get a palindrome (9246429).

The spelling of 8003421 in words is "eight million, three thousand, four hundred twenty-one".