125169139 has 2 divisors, whose sum is σ = 125169140. Its totient is φ = 125169138.

The previous prime is 125169097. The next prime is 125169203. The reversal of 125169139 is 931961521.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (931961521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125169139 - 2¹⁹ = 124644851 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 125169098 and 125169107.

It is not a weakly prime, because it can be changed into another prime (125169439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62584569 + 62584570.

It is an arithmetic number, because the mean of its divisors is an integer number (62584570).

Almost surely, 2^125169139 is an apocalyptic number.

125169139 is a deficient number, since it is larger than the sum of its proper divisors (1).

125169139 is an equidigital number, since it uses as much as digits as its factorization.

125169139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 37.

The square root of 125169139 is about 11187.9014564841. The cubic root of 125169139 is about 500.2254170257.

The spelling of 125169139 in words is "one hundred twenty-five million, one hundred sixty-nine thousand, one hundred thirty-nine".