125206189 has 2 divisors, whose sum is σ = 125206190. Its totient is φ = 125206188.

The previous prime is 125206171. The next prime is 125206243. The reversal of 125206189 is 981602521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81090025 + 44116164 = 9005^2 + 6642^2 .

It is a cyclic number.

It is not a de Polignac number, because 125206189 - 2¹⁵ = 125173421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125206129) 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, 62603094 + 62603095.

It is an arithmetic number, because the mean of its divisors is an integer number (62603095).

Almost surely, 2^125206189 is an apocalyptic number.

It is an amenable number.

125206189 is a deficient number, since it is larger than the sum of its proper divisors (1).

125206189 is an equidigital number, since it uses as much as digits as its factorization.

125206189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 125206189 is about 11189.5571404770. The cubic root of 125206189 is about 500.2747676445.

The spelling of 125206189 in words is "one hundred twenty-five million, two hundred six thousand, one hundred eighty-nine".