125705389 has 2 divisors, whose sum is σ = 125705390. Its totient is φ = 125705388.

The previous prime is 125705369. The next prime is 125705413. The reversal of 125705389 is 983507521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119727364 + 5978025 = 10942^2 + 2445^2 .

It is a cyclic number.

It is not a de Polignac number, because 125705389 - 2¹¹ = 125703341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125705369) 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, 62852694 + 62852695.

It is an arithmetic number, because the mean of its divisors is an integer number (62852695).

Almost surely, 2^125705389 is an apocalyptic number.

It is an amenable number.

125705389 is a deficient number, since it is larger than the sum of its proper divisors (1).

125705389 is an equidigital number, since it uses as much as digits as its factorization.

125705389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 125705389 is about 11211.8414633815. The cubic root of 125705389 is about 500.9387550416.

The spelling of 125705389 in words is "one hundred twenty-five million, seven hundred five thousand, three hundred eighty-nine".