8236421 has 8 divisors (see below), whose sum is σ = 8684544. Its totient is φ = 7799760.

The previous prime is 8236399. The next prime is 8236433. The reversal of 8236421 is 1246328.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8236421 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 (8236441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1370 + ... + 4283.

It is an arithmetic number, because the mean of its divisors is an integer number (1085568).

Almost surely, 2^8236421 is an apocalyptic number.

It is an amenable number.

8236421 is a deficient number, since it is larger than the sum of its proper divisors (448123).

8236421 is a wasteful number, since it uses less digits than its factorization.

8236421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731.

The product of its digits is 2304, while the sum is 26.

The square root of 8236421 is about 2869.9165493094. The cubic root of 8236421 is about 201.9510795496.

The spelling of 8236421 in words is "eight million, two hundred thirty-six thousand, four hundred twenty-one".