12418581 has 12 divisors (see below), whose sum is σ = 18948192. Its totient is φ = 7087104.

The previous prime is 12418579. The next prime is 12418633. The reversal of 12418581 is 18581421.

It is a happy number.

12418581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12418581 - 2¹ = 12418579 is a prime.

It is a super-2 number, since 2×12418581² = 308442308107122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12418501) 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, 15765 + ... + 16533.

It is an arithmetic number, because the mean of its divisors is an integer number (1579016).

Almost surely, 2^12418581 is an apocalyptic number.

It is an amenable number.

12418581 is a deficient number, since it is larger than the sum of its proper divisors (6529611).

12418581 is an frugal number, since it uses more digits than its factorization.

12418581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 779 counting only the distinct ones).

The product of its digits is 2560, while the sum is 30.

The square root of 12418581 is about 3524.0007094210. Note that the first 3 decimals coincide. The cubic root of 12418581 is about 231.5744589885.

The spelling of 12418581 in words is "twelve million, four hundred eighteen thousand, five hundred eighty-one".