12609481 has 2 divisors, whose sum is σ = 12609482. Its totient is φ = 12609480.

The previous prime is 12609463. The next prime is 12609491. The reversal of 12609481 is 18490621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7203856 + 5405625 = 2684^2 + 2325^2 .

It is a cyclic number.

It is not a de Polignac number, because 12609481 - 2⁷ = 12609353 is a prime.

It is a super-2 number, since 2×12609481² = 317998022178722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12609491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6304740 + 6304741.

It is an arithmetic number, because the mean of its divisors is an integer number (6304741).

Almost surely, 2^12609481 is an apocalyptic number.

It is an amenable number.

12609481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12609481 is an equidigital number, since it uses as much as digits as its factorization.

12609481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12609481 is about 3550.9831033110. The cubic root of 12609481 is about 232.7550275172.

The spelling of 12609481 in words is "twelve million, six hundred nine thousand, four hundred eighty-one".