125217539 has 2 divisors, whose sum is σ = 125217540. Its totient is φ = 125217538.

The previous prime is 125217511. The next prime is 125217551. The reversal of 125217539 is 935712521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125217539 - 2⁸ = 125217283 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 125217499 and 125217508.

It is not a weakly prime, because it can be changed into another prime (125217559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62608769 + 62608770.

It is an arithmetic number, because the mean of its divisors is an integer number (62608770).

Almost surely, 2^125217539 is an apocalyptic number.

125217539 is a deficient number, since it is larger than the sum of its proper divisors (1).

125217539 is an equidigital number, since it uses as much as digits as its factorization.

125217539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 35.

The square root of 125217539 is about 11190.0642982961. The cubic root of 125217539 is about 500.2898839022.

The spelling of 125217539 in words is "one hundred twenty-five million, two hundred seventeen thousand, five hundred thirty-nine".