125545139 has 2 divisors, whose sum is σ = 125545140. Its totient is φ = 125545138.

The previous prime is 125545129. The next prime is 125545159. The reversal of 125545139 is 931545521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125545139 - 2⁸ = 125544883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125545099 and 125545108.

It is not a weakly prime, because it can be changed into another prime (125545129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62772569 + 62772570.

It is an arithmetic number, because the mean of its divisors is an integer number (62772570).

Almost surely, 2^125545139 is an apocalyptic number.

125545139 is a deficient number, since it is larger than the sum of its proper divisors (1).

125545139 is an equidigital number, since it uses as much as digits as its factorization.

125545139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 35.

The square root of 125545139 is about 11204.6927222481. The cubic root of 125545139 is about 500.7257979250.

The spelling of 125545139 in words is "one hundred twenty-five million, five hundred forty-five thousand, one hundred thirty-nine".