125444489 has 2 divisors, whose sum is σ = 125444490. Its totient is φ = 125444488.

The previous prime is 125444471. The next prime is 125444491. The reversal of 125444489 is 984444521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 4489 = 11200^2 + 67^2 .

It is an emirp because it is prime and its reverse (984444521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125444489 - 2²⁰ = 124395913 is a prime.

It is a super-2 number, since 2×125444489² = 31472639640942242, which contains 22 as substring.

Together with 125444491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125414489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62722244 + 62722245.

It is an arithmetic number, because the mean of its divisors is an integer number (62722245).

Almost surely, 2^125444489 is an apocalyptic number.

It is an amenable number.

125444489 is a deficient number, since it is larger than the sum of its proper divisors (1).

125444489 is an equidigital number, since it uses as much as digits as its factorization.

125444489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 41.

The square root of 125444489 is about 11200.2003999929. The cubic root of 125444489 is about 500.5919509117.

It can be divided in two parts, 12544 and 4489, that multiplied together give a square (56310016 = 7504²).

The spelling of 125444489 in words is "one hundred twenty-five million, four hundred forty-four thousand, four hundred eighty-nine".