125757009 has 16 divisors (see below), whose sum is σ = 212922240. Its totient is φ = 71861040.

The previous prime is 125757001. The next prime is 125757011. The reversal of 125757009 is 900757521.

125757009 is a `hidden beast` number, since 12 + 575 + 70 + 0 + 9 = 666.

It is not a de Polignac number, because 125757009 - 2³ = 125757001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125757001) 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, 332502 + ... + 332879.

It is an arithmetic number, because the mean of its divisors is an integer number (13307640).

Almost surely, 2^125757009 is an apocalyptic number.

It is an amenable number.

125757009 is a deficient number, since it is larger than the sum of its proper divisors (87165231).

125757009 is an equidigital number, since it uses as much as digits as its factorization.

125757009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665397 (or 665391 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 125757009 is about 11214.1432575119. The cubic root of 125757009 is about 501.0073146051.

The spelling of 125757009 in words is "one hundred twenty-five million, seven hundred fifty-seven thousand, nine".