12461551 has 2 divisors, whose sum is σ = 12461552. Its totient is φ = 12461550.

The previous prime is 12461543. The next prime is 12461591. The reversal of 12461551 is 15516421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12461551 - 2³ = 12461543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12461591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6230775 + 6230776.

It is an arithmetic number, because the mean of its divisors is an integer number (6230776).

Almost surely, 2^12461551 is an apocalyptic number.

12461551 is a deficient number, since it is larger than the sum of its proper divisors (1).

12461551 is an equidigital number, since it uses as much as digits as its factorization.

12461551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 25.

The square root of 12461551 is about 3530.0922084274. The cubic root of 12461551 is about 231.8412446897.

Adding to 12461551 its reverse (15516421), we get a palindrome (27977972).

The spelling of 12461551 in words is "twelve million, four hundred sixty-one thousand, five hundred fifty-one".