12144581 has 2 divisors, whose sum is σ = 12144582. Its totient is φ = 12144580.

The previous prime is 12144577. The next prime is 12144589. The reversal of 12144581 is 18544121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7344100 + 4800481 = 2710^2 + 2191^2 .

It is an emirp because it is prime and its reverse (18544121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12144581 - 2² = 12144577 is a prime.

It is a super-2 number, since 2×12144581² = 294981695331122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12144581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12144589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6072290 + 6072291.

It is an arithmetic number, because the mean of its divisors is an integer number (6072291).

Almost surely, 2^12144581 is an apocalyptic number.

It is an amenable number.

12144581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12144581 is an equidigital number, since it uses as much as digits as its factorization.

12144581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 26.

The square root of 12144581 is about 3484.9076027924. The cubic root of 12144581 is about 229.8586466042.

The spelling of 12144581 in words is "twelve million, one hundred forty-four thousand, five hundred eighty-one".