8581121 has 4 divisors (see below), whose sum is σ = 8684592. Its totient is φ = 8477652.

The previous prime is 8581117. The next prime is 8581147. The reversal of 8581121 is 1211858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8581121 - 2² = 8581117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8581171) 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, 51611 + ... + 51776.

It is an arithmetic number, because the mean of its divisors is an integer number (2171148).

It is a Proth number, since it is equal to 2095 ⋅ 2¹² + 1 and 2095 < 2¹².

Almost surely, 2^8581121 is an apocalyptic number.

It is an amenable number.

8581121 is a deficient number, since it is larger than the sum of its proper divisors (103471).

8581121 is a wasteful number, since it uses less digits than its factorization.

8581121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103470.

The product of its digits is 640, while the sum is 26.

The square root of 8581121 is about 2929.3550484706. The cubic root of 8581121 is about 204.7299318943.

Adding to 8581121 its reverse (1211858), we get a palindrome (9792979).

It can be divided in two parts, 8581 and 121, that multiplied together give a palindrome (1038301).

The spelling of 8581121 in words is "eight million, five hundred eighty-one thousand, one hundred twenty-one".