12280549 has 2 divisors, whose sum is σ = 12280550. Its totient is φ = 12280548.

The previous prime is 12280547. The next prime is 12280561. The reversal of 12280549 is 94508221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8208225 + 4072324 = 2865^2 + 2018^2 .

It is an emirp because it is prime and its reverse (94508221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12280549 - 2¹ = 12280547 is a prime.

Together with 12280547, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12280549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12280547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6140274 + 6140275.

It is an arithmetic number, because the mean of its divisors is an integer number (6140275).

Almost surely, 2^12280549 is an apocalyptic number.

It is an amenable number.

12280549 is a deficient number, since it is larger than the sum of its proper divisors (1).

12280549 is an equidigital number, since it uses as much as digits as its factorization.

12280549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 12280549 is about 3504.3614254240. The cubic root of 12280549 is about 230.7132803190.

The spelling of 12280549 in words is "twelve million, two hundred eighty thousand, five hundred forty-nine".