8117021 has 8 divisors (see below), whose sum is σ = 8895744. Its totient is φ = 7345120.

The previous prime is 8117017. The next prime is 8117027. The reversal of 8117021 is 1207118.

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

It is a cyclic number.

It is not a de Polignac number, because 8117021 - 2² = 8117017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8116984 and 8117002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8117027) 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, 980 + ... + 4146.

It is an arithmetic number, because the mean of its divisors is an integer number (1111968).

Almost surely, 2^8117021 is an apocalyptic number.

It is an amenable number.

8117021 is a deficient number, since it is larger than the sum of its proper divisors (778723).

8117021 is a wasteful number, since it uses less digits than its factorization.

8117021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 8117021 is about 2849.0386097770. The cubic root of 8117021 is about 200.9704584357.

Subtracting from 8117021 its reverse (1207118), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8117021 in words is "eight million, one hundred seventeen thousand, twenty-one".