125205103 has 4 divisors (see below), whose sum is σ = 128258928. Its totient is φ = 122151280.

The previous prime is 125205097. The next prime is 125205127. The reversal of 125205103 is 301502521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301502521 = 1223 ⋅246527.

It is a cyclic number.

It is not a de Polignac number, because 125205103 - 2⁵ = 125205071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125205403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526851 + ... + 1526932.

It is an arithmetic number, because the mean of its divisors is an integer number (32064732).

Almost surely, 2^125205103 is an apocalyptic number.

125205103 is a deficient number, since it is larger than the sum of its proper divisors (3053825).

125205103 is an equidigital number, since it uses as much as digits as its factorization.

125205103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053824.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 125205103 is about 11189.5086129821. The cubic root of 125205103 is about 500.2733212305.

Adding to 125205103 its reverse (301502521), we get a palindrome (426707624).

The spelling of 125205103 in words is "one hundred twenty-five million, two hundred five thousand, one hundred three".