12548581 has 4 divisors (see below), whose sum is σ = 12595500. Its totient is φ = 12501664.

The previous prime is 12548579. The next prime is 12548633. The reversal of 12548581 is 18584521.

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 3940225 + 8608356 = 1985^2 + 2934^2 .

It is a cyclic number.

It is not a de Polignac number, because 12548581 - 2¹ = 12548579 is a prime.

It is a super-2 number, since 2×12548581² = 314933770227122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12548551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23056 + ... + 23593.

It is an arithmetic number, because the mean of its divisors is an integer number (3148875).

Almost surely, 2^12548581 is an apocalyptic number.

It is an amenable number.

12548581 is a deficient number, since it is larger than the sum of its proper divisors (46919).

12548581 is an equidigital number, since it uses as much as digits as its factorization.

12548581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46918.

The product of its digits is 12800, while the sum is 34.

The square root of 12548581 is about 3542.3976343714. The cubic root of 12548581 is about 232.3797103893.

The spelling of 12548581 in words is "twelve million, five hundred forty-eight thousand, five hundred eighty-one".