8657121 has 8 divisors (see below), whose sum is σ = 12592224. Its totient is φ = 5246720.

The previous prime is 8657111. The next prime is 8657123. The reversal of 8657121 is 1217568.

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 8657121 - 2¹⁰ = 8656097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8657123) 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, 131136 + ... + 131201.

It is an arithmetic number, because the mean of its divisors is an integer number (1574028).

Almost surely, 2^8657121 is an apocalyptic number.

It is an amenable number.

8657121 is a deficient number, since it is larger than the sum of its proper divisors (3935103).

8657121 is a wasteful number, since it uses less digits than its factorization.

8657121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262351.

The product of its digits is 3360, while the sum is 30.

The square root of 8657121 is about 2942.2985912378. The cubic root of 8657121 is about 205.3325635149.

It can be divided in two parts, 8657 and 121, that added together give a palindrome (8778).

The spelling of 8657121 in words is "eight million, six hundred fifty-seven thousand, one hundred twenty-one".