8476021 has 4 divisors (see below), whose sum is σ = 8560044. Its totient is φ = 8392000.

The previous prime is 8476009. The next prime is 8476063. The reversal of 8476021 is 1206748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8236900 + 239121 = 2870^2 + 489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8476021 is a prime.

It is a Duffinian number.

8476021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8476001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41860 + ... + 42061.

It is an arithmetic number, because the mean of its divisors is an integer number (2140011).

Almost surely, 2^8476021 is an apocalyptic number.

It is an amenable number.

8476021 is a deficient number, since it is larger than the sum of its proper divisors (84023).

8476021 is a wasteful number, since it uses less digits than its factorization.

8476021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84022.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 8476021 is about 2911.3606784457. The cubic root of 8476021 is about 203.8906645305.

The spelling of 8476021 in words is "eight million, four hundred seventy-six thousand, twenty-one".