125549959 has 2 divisors, whose sum is σ = 125549960. Its totient is φ = 125549958.

The previous prime is 125549923. The next prime is 125549987. The reversal of 125549959 is 959945521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125549959 - 2¹⁹ = 125025671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125549989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62774979 + 62774980.

It is an arithmetic number, because the mean of its divisors is an integer number (62774980).

Almost surely, 2^125549959 is an apocalyptic number.

125549959 is a deficient number, since it is larger than the sum of its proper divisors (1).

125549959 is an equidigital number, since it uses as much as digits as its factorization.

125549959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729000, while the sum is 49.

The square root of 125549959 is about 11204.9078086346. The cubic root of 125549959 is about 500.7322058923.

The spelling of 125549959 in words is "one hundred twenty-five million, five hundred forty-nine thousand, nine hundred fifty-nine".