8421235 has 4 divisors (see below), whose sum is σ = 10105488. Its totient is φ = 6736984.

The previous prime is 8421229. The next prime is 8421241. The reversal of 8421235 is 5321248.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (8421229) and next prime (8421241).

It is a cyclic number.

It is not a de Polignac number, because 8421235 - 2³ = 8421227 is a prime.

It is a Duffinian number.

8421235 is a lucky number.

It is an unprimeable number.

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, 842119 + ... + 842128.

It is an arithmetic number, because the mean of its divisors is an integer number (2526372).

Almost surely, 2^8421235 is an apocalyptic number.

8421235 is a deficient number, since it is larger than the sum of its proper divisors (1684253).

8421235 is a wasteful number, since it uses less digits than its factorization.

8421235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684252.

The product of its digits is 1920, while the sum is 25.

The square root of 8421235 is about 2901.9364224600. The cubic root of 8421235 is about 203.4504222748.

The spelling of 8421235 in words is "eight million, four hundred twenty-one thousand, two hundred thirty-five".