12458561 has 2 divisors, whose sum is σ = 12458562. Its totient is φ = 12458560.

The previous prime is 12458543. The next prime is 12458581. The reversal of 12458561 is 16585421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11122225 + 1336336 = 3335^2 + 1156^2 .

It is a cyclic number.

It is not a de Polignac number, because 12458561 - 2¹⁰ = 12457537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12458521) 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, 6229280 + 6229281.

It is an arithmetic number, because the mean of its divisors is an integer number (6229281).

Almost surely, 2^12458561 is an apocalyptic number.

It is an amenable number.

12458561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12458561 is an equidigital number, since it uses as much as digits as its factorization.

12458561 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 12458561 is about 3529.6686813354. The cubic root of 12458561 is about 231.8227006960.

It can be divided in two parts, 124 and 58561, that added together give a palindrome (58685).

The spelling of 12458561 in words is "twelve million, four hundred fifty-eight thousand, five hundred sixty-one".