125505305 has 16 divisors (see below), whose sum is σ = 163359504. Its totient is φ = 92190720.

The previous prime is 125505287. The next prime is 125505307. The reversal of 125505305 is 503505521.

It can be written as a sum of positive squares in 8 ways, for example, as 6869641 + 118635664 = 2621^2 + 10892^2 .

It is not a de Polignac number, because 125505305 - 2⁸ = 125505049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125505307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14522 + ... + 21491.

It is an arithmetic number, because the mean of its divisors is an integer number (10209969).

Almost surely, 2^125505305 is an apocalyptic number.

It is an amenable number.

125505305 is a deficient number, since it is larger than the sum of its proper divisors (37854199).

125505305 is a wasteful number, since it uses less digits than its factorization.

125505305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36076.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 125505305 is about 11202.9150224395. The cubic root of 125505305 is about 500.6728341822.

The spelling of 125505305 in words is "one hundred twenty-five million, five hundred five thousand, three hundred five".