125805245 has 8 divisors (see below), whose sum is σ = 151299384. Its totient is φ = 100422144.

The previous prime is 125805233. The next prime is 125805247. The reversal of 125805245 is 542508521.

It can be written as a sum of positive squares in 4 ways, for example, as 13741849 + 112063396 = 3707^2 + 10586^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 125805245 - 2⁶ = 125805181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125805247) 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, 25244 + ... + 29813.

It is an arithmetic number, because the mean of its divisors is an integer number (18912423).

Almost surely, 2^125805245 is an apocalyptic number.

It is an amenable number.

125805245 is a deficient number, since it is larger than the sum of its proper divisors (25494139).

125805245 is an equidigital number, since it uses as much as digits as its factorization.

125805245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55519.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 125805245 is about 11216.2937283222. The cubic root of 125805245 is about 501.0713627242.

The spelling of 125805245 in words is "one hundred twenty-five million, eight hundred five thousand, two hundred forty-five".