8433421 has 4 divisors (see below), whose sum is σ = 8476000. Its totient is φ = 8390844.

The previous prime is 8433409. The next prime is 8433443. The reversal of 8433421 is 1243348.

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 not a de Polignac number, because 8433421 - 2⁹ = 8432909 is a prime.

It is a super-2 number, since 2×8433421² = 142245179526482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8433121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20991 + ... + 21388.

It is an arithmetic number, because the mean of its divisors is an integer number (2119000).

Almost surely, 2^8433421 is an apocalyptic number.

It is an amenable number.

8433421 is a deficient number, since it is larger than the sum of its proper divisors (42579).

8433421 is a wasteful number, since it uses less digits than its factorization.

8433421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42578.

The product of its digits is 2304, while the sum is 25.

The square root of 8433421 is about 2904.0352959288. The cubic root of 8433421 is about 203.5485097064.

Adding to 8433421 its reverse (1243348), we get a palindrome (9676769).

The spelling of 8433421 in words is "eight million, four hundred thirty-three thousand, four hundred twenty-one".