125136305 has 64 divisors (see below), whose sum is σ = 189665280. Its totient is φ = 77414400.

The previous prime is 125136287. The next prime is 125136317. The reversal of 125136305 is 503631521.

It is not a de Polignac number, because 125136305 - 2⁸ = 125136049 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1290017 + ... + 1290113.

It is an arithmetic number, because the mean of its divisors is an integer number (2963520).

Almost surely, 2^125136305 is an apocalyptic number.

It is an amenable number.

125136305 is a deficient number, since it is larger than the sum of its proper divisors (64528975).

125136305 is a wasteful number, since it uses less digits than its factorization.

125136305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 125136305 is about 11186.4339715568. The cubic root of 125136305 is about 500.1816739811.

Adding to 125136305 its reverse (503631521), we get a palindrome (628767826).

The spelling of 125136305 in words is "one hundred twenty-five million, one hundred thirty-six thousand, three hundred five".