125503123 has 4 divisors (see below), whose sum is σ = 125991720. Its totient is φ = 125014528.

The previous prime is 125503121. The next prime is 125503141. The reversal of 125503123 is 321305521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321305521 = 37 ⋅8683933.

It is a cyclic number.

It is not a de Polignac number, because 125503123 - 2¹ = 125503121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125503094 and 125503103.

It is not an unprimeable number, because it can be changed into a prime (125503121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243913 + ... + 244426.

It is an arithmetic number, because the mean of its divisors is an integer number (31497930).

Almost surely, 2^125503123 is an apocalyptic number.

125503123 is a deficient number, since it is larger than the sum of its proper divisors (488597).

125503123 is an equidigital number, since it uses as much as digits as its factorization.

125503123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488596.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 125503123 is about 11202.8176366484. The cubic root of 125503123 is about 500.6699326463.

Adding to 125503123 its reverse (321305521), we get a palindrome (446808644).

The spelling of 125503123 in words is "one hundred twenty-five million, five hundred three thousand, one hundred twenty-three".