8685121 has 4 divisors (see below), whose sum is σ = 8919892. Its totient is φ = 8450352.

The previous prime is 8685107. The next prime is 8685151. The reversal of 8685121 is 1215868.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8179600 + 505521 = 2860^2 + 711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8685121 is a prime.

It is a Duffinian number.

8685121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8685151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117330 + ... + 117403.

It is an arithmetic number, because the mean of its divisors is an integer number (2229973).

Almost surely, 2^8685121 is an apocalyptic number.

It is an amenable number.

8685121 is a deficient number, since it is larger than the sum of its proper divisors (234771).

8685121 is a wasteful number, since it uses less digits than its factorization.

8685121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234770.

The product of its digits is 3840, while the sum is 31.

The square root of 8685121 is about 2947.0529347129. The cubic root of 8685121 is about 205.5536964797.

The spelling of 8685121 in words is "eight million, six hundred eighty-five thousand, one hundred twenty-one".