125506559 has 2 divisors, whose sum is σ = 125506560. Its totient is φ = 125506558.

The previous prime is 125506547. The next prime is 125506573. The reversal of 125506559 is 955605521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125506559 - 2⁴ = 125506543 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125506859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62753279 + 62753280.

It is an arithmetic number, because the mean of its divisors is an integer number (62753280).

Almost surely, 2^125506559 is an apocalyptic number.

125506559 is a deficient number, since it is larger than the sum of its proper divisors (1).

125506559 is an equidigital number, since it uses as much as digits as its factorization.

125506559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67500, while the sum is 38.

The square root of 125506559 is about 11202.9709898759. The cubic root of 125506559 is about 500.6745016858.

The spelling of 125506559 in words is "one hundred twenty-five million, five hundred six thousand, five hundred fifty-nine".