12556545 has 16 divisors (see below), whose sum is σ = 20421312. Its totient is φ = 6586560.

The previous prime is 12556543. The next prime is 12556547. The reversal of 12556545 is 54565521.

12556545 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12556543) and next prime (12556547).

It is not a de Polignac number, because 12556545 - 2¹ = 12556543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12556543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5947 + ... + 7776.

It is an arithmetic number, because the mean of its divisors is an integer number (1276332).

Almost surely, 2^12556545 is an apocalyptic number.

12556545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12556545 is a deficient number, since it is larger than the sum of its proper divisors (7864767).

12556545 is a wasteful number, since it uses less digits than its factorization.

12556545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792.

The product of its digits is 30000, while the sum is 33.

The square root of 12556545 is about 3543.5215534832. The cubic root of 12556545 is about 232.4288601867.

The spelling of 12556545 in words is "twelve million, five hundred fifty-six thousand, five hundred forty-five".