12555947 has 2 divisors, whose sum is σ = 12555948. Its totient is φ = 12555946.

The previous prime is 12555931. The next prime is 12555989. The reversal of 12555947 is 74955521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12555947 - 2⁴ = 12555931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12555947.

It is not a weakly prime, because it can be changed into another prime (12555997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6277973 + 6277974.

It is an arithmetic number, because the mean of its divisors is an integer number (6277974).

Almost surely, 2^12555947 is an apocalyptic number.

12555947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12555947 is an equidigital number, since it uses as much as digits as its factorization.

12555947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 38.

The square root of 12555947 is about 3543.4371731414. The cubic root of 12555947 is about 232.4251703536.

The spelling of 12555947 in words is "twelve million, five hundred fifty-five thousand, nine hundred forty-seven".