8855421 has 8 divisors (see below), whose sum is σ = 11929344. Its totient is φ = 5842560.

The previous prime is 8855401. The next prime is 8855423. The reversal of 8855421 is 1245588.

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

It is not a de Polignac number, because 8855421 - 2⁵ = 8855389 is a prime.

It is a Curzon number.

8855421 is a lucky number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8855423) 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, 14925 + ... + 15506.

It is an arithmetic number, because the mean of its divisors is an integer number (1491168).

Almost surely, 2^8855421 is an apocalyptic number.

It is an amenable number.

8855421 is a deficient number, since it is larger than the sum of its proper divisors (3073923).

8855421 is a wasteful number, since it uses less digits than its factorization.

8855421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30531.

The product of its digits is 12800, while the sum is 33.

The square root of 8855421 is about 2975.8059412536. The cubic root of 8855421 is about 206.8885254770. Note that the first 3 decimals are identical.

The spelling of 8855421 in words is "eight million, eight hundred fifty-five thousand, four hundred twenty-one".