125808521 has 8 divisors (see below), whose sum is σ = 127915200. Its totient is φ = 123711280.

The previous prime is 125808511. The next prime is 125808533.

It is a happy number.

125808521 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125808521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125808511) 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 7 ways as a sum of consecutive naturals, for example, 27635 + ... + 31863.

It is an arithmetic number, because the mean of its divisors is an integer number (15989400).

Almost surely, 2^125808521 is an apocalyptic number.

It is an amenable number.

125808521 is a deficient number, since it is larger than the sum of its proper divisors (2106679).

125808521 is an equidigital number, since it uses as much as digits as its factorization.

125808521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 125808521 is about 11216.4397649165. The cubic root of 125808521 is about 501.0757120276.

The spelling of 125808521 in words is "one hundred twenty-five million, eight hundred eight thousand, five hundred twenty-one".