8634921 has 8 divisors (see below), whose sum is σ = 11555904. Its totient is φ = 5735280.

The previous prime is 8634917. The next prime is 8634947. The reversal of 8634921 is 1294368.

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

It is not a de Polignac number, because 8634921 - 2² = 8634917 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

8634921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8634961) 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, 4365 + ... + 6026.

It is an arithmetic number, because the mean of its divisors is an integer number (1444488).

Almost surely, 2^8634921 is an apocalyptic number.

It is an amenable number.

8634921 is a deficient number, since it is larger than the sum of its proper divisors (2920983).

8634921 is a wasteful number, since it uses less digits than its factorization.

8634921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10671.

The product of its digits is 10368, while the sum is 33.

The square root of 8634921 is about 2938.5236088893. The cubic root of 8634921 is about 205.1568975355.

The spelling of 8634921 in words is "eight million, six hundred thirty-four thousand, nine hundred twenty-one".