8623521 has 12 divisors (see below), whose sum is σ = 12746448. Its totient is φ = 5615064.

The previous prime is 8623519. The next prime is 8623523. The reversal of 8623521 is 1253268.

It is an interprime number because it is at equal distance from previous prime (8623519) and next prime (8623523).

It is not a de Polignac number, because 8623521 - 2¹ = 8623519 is a prime.

It is a super-2 number, since 2×8623521² = 148730228874882, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8623523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10755 + ... + 11528.

It is an arithmetic number, because the mean of its divisors is an integer number (1062204).

Almost surely, 2^8623521 is an apocalyptic number.

It is an amenable number.

8623521 is a deficient number, since it is larger than the sum of its proper divisors (4122927).

8623521 is a wasteful number, since it uses less digits than its factorization.

8623521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22332 (or 22329 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 8623521 is about 2936.5832186403. The cubic root of 8623521 is about 205.0665736585.

Adding to 8623521 its reverse (1253268), we get a palindrome (9876789).

The spelling of 8623521 in words is "eight million, six hundred twenty-three thousand, five hundred twenty-one".