126503 has 8 divisors (see below), whose sum is σ = 140448. Its totient is φ = 113184.

The previous prime is 126499. The next prime is 126517. The reversal of 126503 is 305621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126503 - 2² = 126499 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 (126583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350 + ... + 612.

It is an arithmetic number, because the mean of its divisors is an integer number (17556).

2¹²⁶⁵⁰³ is an apocalyptic number.

126503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

126503 is a deficient number, since it is larger than the sum of its proper divisors (13945).

126503 is a wasteful number, since it uses less digits than its factorization.

126503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 126503 is about 355.6726022622. The cubic root of 126503 is about 50.1996021196.

It can be divided in two parts, 12650 and 3, that multiplied together give a triangular number (37950 = T₂₇₅).

The spelling of 126503 in words is "one hundred twenty-six thousand, five hundred three".