125203505 has 16 divisors (see below), whose sum is σ = 171897600. Its totient is φ = 85758912.

The previous prime is 125203501. The next prime is 125203531. The reversal of 125203505 is 505302521.

It is a cyclic number.

It is not a de Polignac number, because 125203505 - 2² = 125203501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125203501) 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, 47687 + ... + 50243.

It is an arithmetic number, because the mean of its divisors is an integer number (10743600).

Almost surely, 2^125203505 is an apocalyptic number.

It is an amenable number.

125203505 is a deficient number, since it is larger than the sum of its proper divisors (46694095).

125203505 is a wasteful number, since it uses less digits than its factorization.

125203505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 125203505 is about 11189.4372065801. The cubic root of 125203505 is about 500.2711928822.

The spelling of 125203505 in words is "one hundred twenty-five million, two hundred three thousand, five hundred five".