12456551 has 6 divisors (see below), whose sum is σ = 12729480. Its totient is φ = 12189356.

The previous prime is 12456539. The next prime is 12456581. The reversal of 12456551 is 15565421.

It is a happy number.

It is not a de Polignac number, because 12456551 - 2⁶ = 12456487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12456581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611 + ... + 5028.

It is an arithmetic number, because the mean of its divisors is an integer number (2121580).

Almost surely, 2^12456551 is an apocalyptic number.

12456551 is a deficient number, since it is larger than the sum of its proper divisors (272929).

12456551 is an frugal number, since it uses more digits than its factorization.

12456551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5733 (or 5686 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 12456551 is about 3529.3839405766. The cubic root of 12456551 is about 231.8102329990.

The spelling of 12456551 in words is "twelve million, four hundred fifty-six thousand, five hundred fifty-one".