8616421 has 8 divisors (see below), whose sum is σ = 9808704. Its totient is φ = 7492320.

The previous prime is 8616407. The next prime is 8616431. The reversal of 8616421 is 1246168.

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

It is a de Polignac number, because none of the positive numbers 2^k-8616421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8616421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8616431) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16776 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (1226088).

Almost surely, 2^8616421 is an apocalyptic number.

It is an amenable number.

8616421 is a deficient number, since it is larger than the sum of its proper divisors (1192283).

8616421 is a wasteful number, since it uses less digits than its factorization.

8616421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34091.

The product of its digits is 2304, while the sum is 28.

The square root of 8616421 is about 2935.3740817824. The cubic root of 8616421 is about 205.0102790801.

The spelling of 8616421 in words is "eight million, six hundred sixteen thousand, four hundred twenty-one".