125460509 has 2 divisors, whose sum is σ = 125460510. Its totient is φ = 125460508.

The previous prime is 125460497. The next prime is 125460523. The reversal of 125460509 is 905064521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117787609 + 7672900 = 10853^2 + 2770^2 .

It is an emirp because it is prime and its reverse (905064521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125460509 - 2²⁴ = 108683293 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125460539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62730254 + 62730255.

It is an arithmetic number, because the mean of its divisors is an integer number (62730255).

Almost surely, 2^125460509 is an apocalyptic number.

It is an amenable number.

125460509 is a deficient number, since it is larger than the sum of its proper divisors (1).

125460509 is an equidigital number, since it uses as much as digits as its factorization.

125460509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 125460509 is about 11200.9155429367. The cubic root of 125460509 is about 500.6132595180.

The spelling of 125460509 in words is "one hundred twenty-five million, four hundred sixty thousand, five hundred nine".