125712289 has 2 divisors, whose sum is σ = 125712290. Its totient is φ = 125712288.

The previous prime is 125712271. The next prime is 125712313. The reversal of 125712289 is 982217521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125619264 + 93025 = 11208^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 125712289 - 2⁹ = 125711777 is a prime.

It is not a weakly prime, because it can be changed into another prime (125712259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62856144 + 62856145.

It is an arithmetic number, because the mean of its divisors is an integer number (62856145).

Almost surely, 2^125712289 is an apocalyptic number.

It is an amenable number.

125712289 is a deficient number, since it is larger than the sum of its proper divisors (1).

125712289 is an equidigital number, since it uses as much as digits as its factorization.

125712289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 125712289 is about 11212.1491695393. The cubic root of 125712289 is about 500.9479204247.

The spelling of 125712289 in words is "one hundred twenty-five million, seven hundred twelve thousand, two hundred eighty-nine".