12548821 has 2 divisors, whose sum is σ = 12548822. Its totient is φ = 12548820.

The previous prime is 12548813. The next prime is 12548827. The reversal of 12548821 is 12884521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8346321 + 4202500 = 2889^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 12548821 - 2³ = 12548813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12548827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6274410 + 6274411.

It is an arithmetic number, because the mean of its divisors is an integer number (6274411).

Almost surely, 2^12548821 is an apocalyptic number.

It is an amenable number.

12548821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12548821 is an equidigital number, since it uses as much as digits as its factorization.

12548821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5120, while the sum is 31.

The square root of 12548821 is about 3542.4315095708. The cubic root of 12548821 is about 232.3811918523.

The spelling of 12548821 in words is "twelve million, five hundred forty-eight thousand, eight hundred twenty-one".