12125549 has 2 divisors, whose sum is σ = 12125550. Its totient is φ = 12125548.

The previous prime is 12125543. The next prime is 12125551. The reversal of 12125549 is 94552121.

12125549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12124324 + 1225 = 3482^2 + 35^2 .

It is an emirp because it is prime and its reverse (94552121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12125549 - 2⁸ = 12125293 is a prime.

Together with 12125551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12125543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6062774 + 6062775.

It is an arithmetic number, because the mean of its divisors is an integer number (6062775).

Almost surely, 2^12125549 is an apocalyptic number.

It is an amenable number.

12125549 is a deficient number, since it is larger than the sum of its proper divisors (1).

12125549 is an equidigital number, since it uses as much as digits as its factorization.

12125549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 12125549 is about 3482.1759002095. The cubic root of 12125549 is about 229.7385118993.

It can be divided in two parts, 121255 and 49, that multiplied together give a palindrome (5941495).

The spelling of 12125549 in words is "twelve million, one hundred twenty-five thousand, five hundred forty-nine".