125043503 has 16 divisors (see below), whose sum is σ = 142285920. Its totient is φ = 108936576.

The previous prime is 125043467. The next prime is 125043509. The reversal of 125043503 is 305340521.

It is not a de Polignac number, because 125043503 - 2⁶ = 125043439 is a prime.

It is a super-2 number, since 2×125043503² = 31271755285022018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125043509) 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, 77501 + ... + 79097.

It is an arithmetic number, because the mean of its divisors is an integer number (8892870).

Almost surely, 2^125043503 is an apocalyptic number.

125043503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

125043503 is a deficient number, since it is larger than the sum of its proper divisors (17242417).

125043503 is a wasteful number, since it uses less digits than its factorization.

125043503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 125043503 is about 11182.2852315616. The cubic root of 125043503 is about 500.0579972724.

The spelling of 125043503 in words is "one hundred twenty-five million, forty-three thousand, five hundred three".