125508508285 has 4 divisors (see below), whose sum is σ = 150610209948. Its totient is φ = 100406806624.

The previous prime is 125508508247. The next prime is 125508508331. The reversal of 125508508285 is 582805805521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582805805521 = 552107 ⋅1055603.

It can be written as a sum of positive squares in 2 ways, for example, as 37012372996 + 88496135289 = 192386^2 + 297483^2 .

It is a cyclic number.

It is not a de Polignac number, because 125508508285 - 2¹⁷ = 125508377213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12550850824 + ... + 12550850833.

It is an arithmetic number, because the mean of its divisors is an integer number (37652552487).

Almost surely, 2^125508508285 is an apocalyptic number.

It is an amenable number.

125508508285 is a deficient number, since it is larger than the sum of its proper divisors (25101701663).

125508508285 is an equidigital number, since it uses as much as digits as its factorization.

125508508285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25101701662.

The product of its (nonzero) digits is 1280000, while the sum is 49.

The spelling of 125508508285 in words is "one hundred twenty-five billion, five hundred eight million, five hundred eight thousand, two hundred eighty-five".