125503 has 4 divisors (see below), whose sum is σ = 143440. Its totient is φ = 107568.

The previous prime is 125497. The next prime is 125507. The reversal of 125503 is 305521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125503 - 2⁵ = 125471 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 (125507) 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, 8958 + ... + 8971.

It is an arithmetic number, because the mean of its divisors is an integer number (35860).

2¹²⁵⁵⁰³ is an apocalyptic number.

125503 is a deficient number, since it is larger than the sum of its proper divisors (17937).

125503 is an equidigital number, since it uses as much as digits as its factorization.

125503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17936.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 125503 is about 354.2640258338. The cubic root of 125503 is about 50.0669769085.

The spelling of 125503 in words is "one hundred twenty-five thousand, five hundred three".