125715805 has 16 divisors (see below), whose sum is σ = 152668800. Its totient is φ = 99374400.

The previous prime is 125715803. The next prime is 125715851. The reversal of 125715805 is 508517521.

It is not a de Polignac number, because 125715805 - 2¹ = 125715803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125715803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202786 + ... + 203404.

It is an arithmetic number, because the mean of its divisors is an integer number (9541800).

Almost surely, 2^125715805 is an apocalyptic number.

It is an amenable number.

125715805 is a deficient number, since it is larger than the sum of its proper divisors (26952995).

125715805 is a wasteful number, since it uses less digits than its factorization.

125715805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044.

The product of its (nonzero) digits is 14000, while the sum is 34.

The square root of 125715805 is about 11212.3059626466. The cubic root of 125715805 is about 500.9525906562.

The spelling of 125715805 in words is "one hundred twenty-five million, seven hundred fifteen thousand, eight hundred five".