8421055 has 12 divisors (see below), whose sum is σ = 10267560. Its totient is φ = 6630144.

The previous prime is 8421041. The next prime is 8421067. The reversal of 8421055 is 5501248.

It is not a de Polignac number, because 8421055 - 2⁷ = 8420927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46956 + ... + 47134.

It is an arithmetic number, because the mean of its divisors is an integer number (855630).

Almost surely, 2^8421055 is an apocalyptic number.

8421055 is a deficient number, since it is larger than the sum of its proper divisors (1846505).

8421055 is an equidigital number, since it uses as much as digits as its factorization.

8421055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 8421055 is about 2901.9054085204. The cubic root of 8421055 is about 203.4489727116.

The spelling of 8421055 in words is "eight million, four hundred twenty-one thousand, fifty-five".