7868021 has 8 divisors (see below), whose sum is σ = 9017664. Its totient is φ = 6724800.

The previous prime is 7867999. The next prime is 7868027. The reversal of 7868021 is 1208687.

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 7868021 - 2¹⁰ = 7866997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7868027) 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, 1406 + ... + 4208.

It is an arithmetic number, because the mean of its divisors is an integer number (1127208).

Almost surely, 2^7868021 is an apocalyptic number.

It is an amenable number.

7868021 is a deficient number, since it is larger than the sum of its proper divisors (1149643).

7868021 is a wasteful number, since it uses less digits than its factorization.

7868021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 7868021 is about 2804.9992869874. Note that the first 3 decimals coincide. The cubic root of 7868021 is about 198.8940708759.

The spelling of 7868021 in words is "seven million, eight hundred sixty-eight thousand, twenty-one".