125992807529 has 4 divisors (see below), whose sum is σ = 126017512260. Its totient is φ = 125968102800.

The previous prime is 125992807477. The next prime is 125992807573. The reversal of 125992807529 is 925708299521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 925708299521 = 139 ⋅6659771939.

It can be written as a sum of positive squares in 2 ways, for example, as 306250000 + 125686557529 = 17500^2 + 354523^2 .

It is a cyclic number.

It is not a de Polignac number, because 125992807529 - 2²⁰ = 125991758953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125992807579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12344714 + ... + 12354915.

It is an arithmetic number, because the mean of its divisors is an integer number (31504378065).

Almost surely, 2^125992807529 is an apocalyptic number.

It is an amenable number.

125992807529 is a deficient number, since it is larger than the sum of its proper divisors (24704731).

125992807529 is an equidigital number, since it uses as much as digits as its factorization.

125992807529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24704730.

The product of its (nonzero) digits is 8164800, while the sum is 59.

The spelling of 125992807529 in words is "one hundred twenty-five billion, nine hundred ninety-two million, eight hundred seven thousand, five hundred twenty-nine".