8612621 has 4 divisors (see below), whose sum is σ = 8619612. Its totient is φ = 8605632.

The previous prime is 8612581. The next prime is 8612627. The reversal of 8612621 is 1262168.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5354596 + 3258025 = 2314^2 + 1805^2 .

It is a cyclic number.

It is not a de Polignac number, because 8612621 - 2¹⁰ = 8611597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8612627) 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, 1100 + ... + 4293.

It is an arithmetic number, because the mean of its divisors is an integer number (2154903).

Almost surely, 2^8612621 is an apocalyptic number.

It is an amenable number.

8612621 is a deficient number, since it is larger than the sum of its proper divisors (6991).

8612621 is a wasteful number, since it uses less digits than its factorization.

8612621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990.

The product of its digits is 1152, while the sum is 26.

The square root of 8612621 is about 2934.7267334456. The cubic root of 8612621 is about 204.9801368817.

Adding to 8612621 its reverse (1262168), we get a palindrome (9874789).

The spelling of 8612621 in words is "eight million, six hundred twelve thousand, six hundred twenty-one".