125142089 has 2 divisors, whose sum is σ = 125142090. Its totient is φ = 125142088.

The previous prime is 125142079. The next prime is 125142091. The reversal of 125142089 is 980241521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121110025 + 4032064 = 11005^2 + 2008^2 .

It is a cyclic number.

It is not a de Polignac number, because 125142089 - 2⁸ = 125141833 is a prime.

Together with 125142091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125142019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62571044 + 62571045.

It is an arithmetic number, because the mean of its divisors is an integer number (62571045).

Almost surely, 2^125142089 is an apocalyptic number.

It is an amenable number.

125142089 is a deficient number, since it is larger than the sum of its proper divisors (1).

125142089 is an equidigital number, since it uses as much as digits as its factorization.

125142089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 125142089 is about 11186.6924959972. The cubic root of 125142089 is about 500.1893802612.

The spelling of 125142089 in words is "one hundred twenty-five million, one hundred forty-two thousand, eighty-nine".