12581120 has 36 divisors (see below), whose sum is σ = 30138780. Its totient is φ = 5031936.

The previous prime is 12581119. The next prime is 12581123. The reversal of 12581120 is 2118521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8386816 + 4194304 = 2896^2 + 2048^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12581092 and 12581101.

It is not an unprimeable number, because it can be changed into a prime (12581123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3635 + ... + 6194.

Almost surely, 2^12581120 is an apocalyptic number.

12581120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12581120 is an abundant number, since it is smaller than the sum of its proper divisors (17557660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12581120 is an frugal number, since it uses more digits than its factorization.

12581120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9850 (or 9836 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 12581120 is about 3546.9874541644. The cubic root of 12581120 is about 232.5803938269.

Adding to 12581120 its reverse (2118521), we get a palindrome (14699641).

The spelling of 12581120 in words is "twelve million, five hundred eighty-one thousand, one hundred twenty".