125129529 has 20 divisors (see below), whose sum is σ = 213625984. Its totient is φ = 71502264.

The previous prime is 125129509. The next prime is 125129531. The reversal of 125129529 is 925921521.

It is a happy number.

125129529 is a `hidden beast` number, since 1 + 2 + 5 + 129 + 529 = 666.

It is not a de Polignac number, because 125129529 - 2¹² = 125125433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125129493 and 125129502.

It is not an unprimeable number, because it can be changed into a prime (125129509) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 109777 + ... + 110910.

Almost surely, 2^125129529 is an apocalyptic number.

It is an amenable number.

125129529 is a deficient number, since it is larger than the sum of its proper divisors (88496455).

125129529 is an equidigital number, since it uses as much as digits as its factorization.

125129529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220706 (or 220697 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 125129529 is about 11186.1311006085. The cubic root of 125129529 is about 500.1726457134.

The spelling of 125129529 in words is "one hundred twenty-five million, one hundred twenty-nine thousand, five hundred twenty-nine".