8434421 has 4 divisors (see below), whose sum is σ = 8451072. Its totient is φ = 8417772.

The previous prime is 8434403. The next prime is 8434427. The reversal of 8434421 is 1244348.

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 8434421 - 2⁶ = 8434357 is a prime.

It is a super-2 number, since 2×8434421² = 142278915210482, 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 (8434427) 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, 7541 + ... + 8586.

It is an arithmetic number, because the mean of its divisors is an integer number (2112768).

Almost surely, 2^8434421 is an apocalyptic number.

It is an amenable number.

8434421 is a deficient number, since it is larger than the sum of its proper divisors (16651).

8434421 is a wasteful number, since it uses less digits than its factorization.

8434421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16650.

The product of its digits is 3072, while the sum is 26.

The square root of 8434421 is about 2904.2074650410. The cubic root of 8434421 is about 203.5565547004.

Adding to 8434421 its reverse (1244348), we get a palindrome (9678769).

The spelling of 8434421 in words is "eight million, four hundred thirty-four thousand, four hundred twenty-one".