125129527 has 4 divisors (see below), whose sum is σ = 128039560. Its totient is φ = 122219496.

The previous prime is 125129509. The next prime is 125129531. The reversal of 125129527 is 725921521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 725921521 = 13 ⋅55840117.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125129527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125129492 and 125129501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125129507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454952 + ... + 1455037.

It is an arithmetic number, because the mean of its divisors is an integer number (32009890).

Almost surely, 2^125129527 is an apocalyptic number.

125129527 is a deficient number, since it is larger than the sum of its proper divisors (2910033).

125129527 is an equidigital number, since it uses as much as digits as its factorization.

125129527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910032.

The product of its digits is 12600, while the sum is 34.

The square root of 125129527 is about 11186.1310112121. The cubic root of 125129527 is about 500.1726430486.

The spelling of 125129527 in words is "one hundred twenty-five million, one hundred twenty-nine thousand, five hundred twenty-seven".