125540489 has 2 divisors, whose sum is σ = 125540490. Its totient is φ = 125540488.

The previous prime is 125540473. The next prime is 125540537. The reversal of 125540489 is 984045521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 100489 = 11200^2 + 317^2 .

It is an emirp because it is prime and its reverse (984045521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125540489 - 2⁴ = 125540473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125540419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62770244 + 62770245.

It is an arithmetic number, because the mean of its divisors is an integer number (62770245).

Almost surely, 2^125540489 is an apocalyptic number.

It is an amenable number.

125540489 is a deficient number, since it is larger than the sum of its proper divisors (1).

125540489 is an equidigital number, since it uses as much as digits as its factorization.

125540489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 125540489 is about 11204.4852179830. The cubic root of 125540489 is about 500.7196158093.

The spelling of 125540489 in words is "one hundred twenty-five million, five hundred forty thousand, four hundred eighty-nine".