12465581 has 2 divisors, whose sum is σ = 12465582. Its totient is φ = 12465580.

The previous prime is 12465529. The next prime is 12465613. The reversal of 12465581 is 18556421.

It is an a-pointer prime, because the next prime (12465613) can be obtained adding 12465581 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 320356 = 3485^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 12465581 - 2¹⁸ = 12203437 is a prime.

It is a super-2 number, since 2×12465581² = 310781419335122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12464581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6232790 + 6232791.

It is an arithmetic number, because the mean of its divisors is an integer number (6232791).

Almost surely, 2^12465581 is an apocalyptic number.

It is an amenable number.

12465581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12465581 is an equidigital number, since it uses as much as digits as its factorization.

12465581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 32.

The square root of 12465581 is about 3530.6629689054. The cubic root of 12465581 is about 231.8662340755.

The spelling of 12465581 in words is "twelve million, four hundred sixty-five thousand, five hundred eighty-one".