12578581 has 2 divisors, whose sum is σ = 12578582. Its totient is φ = 12578580.

The previous prime is 12578561. The next prime is 12578593. The reversal of 12578581 is 18587521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6937956 + 5640625 = 2634^2 + 2375^2 .

It is a cyclic number.

It is not a de Polignac number, because 12578581 - 2⁵ = 12578549 is a prime.

It is a super-2 number, since 2×12578581² = 316441399947122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12578581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12578561) 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 as a sum of consecutive naturals, namely, 6289290 + 6289291.

It is an arithmetic number, because the mean of its divisors is an integer number (6289291).

Almost surely, 2^12578581 is an apocalyptic number.

It is an amenable number.

12578581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12578581 is an equidigital number, since it uses as much as digits as its factorization.

12578581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 37.

The square root of 12578581 is about 3546.6295267479. The cubic root of 12578581 is about 232.5647470655.

The spelling of 12578581 in words is "twelve million, five hundred seventy-eight thousand, five hundred eighty-one".