8591121 has 72 divisors (see below), whose sum is σ = 16598400. Its totient is φ = 4268880.

The previous prime is 8591119. The next prime is 8591129. The reversal of 8591121 is 1211958.

It is not a de Polignac number, because 8591121 - 2¹ = 8591119 is a prime.

8591121 is a Rhonda number in base 10.

Its product of digits (720) is a multiple of the sum of its prime factors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8591129) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 373516 + ... + 373538.

Almost surely, 2^8591121 is an apocalyptic number.

It is an amenable number.

8591121 is a deficient number, since it is larger than the sum of its proper divisors (8007279).

8591121 is a wasteful number, since it uses less digits than its factorization.

8591121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 44 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 8591121 is about 2931.0614118438. The cubic root of 8591121 is about 204.8094282896.

The spelling of 8591121 in words is "eight million, five hundred ninety-one thousand, one hundred twenty-one".