125017729 has 2 divisors, whose sum is σ = 125017730. Its totient is φ = 125017728.

The previous prime is 125017721. The next prime is 125017747. The reversal of 125017729 is 927710521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86862400 + 38155329 = 9320^2 + 6177^2 .

It is an emirp because it is prime and its reverse (927710521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125017729 - 2³ = 125017721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125017694 and 125017703.

It is not a weakly prime, because it can be changed into another prime (125017721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62508864 + 62508865.

It is an arithmetic number, because the mean of its divisors is an integer number (62508865).

Almost surely, 2^125017729 is an apocalyptic number.

It is an amenable number.

125017729 is a deficient number, since it is larger than the sum of its proper divisors (1).

125017729 is an equidigital number, since it uses as much as digits as its factorization.

125017729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 125017729 is about 11181.1327243710. The cubic root of 125017729 is about 500.0236375492.

The spelling of 125017729 in words is "one hundred twenty-five million, seventeen thousand, seven hundred twenty-nine".