12406545 has 24 divisors (see below), whose sum is σ = 22441536. Its totient is φ = 6328608.

The previous prime is 12406531. The next prime is 12406561. The reversal of 12406545 is 54560421.

12406545 is a `hidden beast` number, since 1 + 2 + 4 + 0 + 654 + 5 = 666.

It is not a de Polignac number, because 12406545 - 2⁴ = 12406529 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4959 + ... + 7028.

It is an arithmetic number, because the mean of its divisors is an integer number (935064).

Almost surely, 2^12406545 is an apocalyptic number.

12406545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12406545 is a deficient number, since it is larger than the sum of its proper divisors (10034991).

12406545 is a wasteful number, since it uses less digits than its factorization.

12406545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12021 (or 12018 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 12406545 is about 3522.2925772854. The cubic root of 12406545 is about 231.4996213688.

Adding to 12406545 its reverse (54560421), we get a palindrome (66966966).

The spelling of 12406545 in words is "twelve million, four hundred six thousand, five hundred forty-five".