8610021 has 24 divisors (see below), whose sum is σ = 14963520. Its totient is φ = 4660416.

The previous prime is 8610001. The next prime is 8610061. The reversal of 8610021 is 1200168.

8610021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8610021 - 2²² = 4415717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8609976 and 8610003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8610001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2400 + ... + 4793.

It is an arithmetic number, because the mean of its divisors is an integer number (623480).

Almost surely, 2^8610021 is an apocalyptic number.

It is an amenable number.

8610021 is a deficient number, since it is larger than the sum of its proper divisors (6353499).

8610021 is a wasteful number, since it uses less digits than its factorization.

8610021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7225 (or 7222 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 8610021 is about 2934.2837286125. The cubic root of 8610021 is about 204.9595081635.

Adding to 8610021 its reverse (1200168), we get a palindrome (9810189).

The spelling of 8610021 in words is "eight million, six hundred ten thousand, twenty-one".