126403103 has 4 divisors (see below), whose sum is σ = 126570840. Its totient is φ = 126235368.

The previous prime is 126403099. The next prime is 126403111. The reversal of 126403103 is 301304621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301304621 = 379 ⋅794999.

It is a cyclic number.

It is not a de Polignac number, because 126403103 - 2² = 126403099 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 (126403183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82733 + ... + 84246.

It is an arithmetic number, because the mean of its divisors is an integer number (31642710).

Almost surely, 2^126403103 is an apocalyptic number.

126403103 is a deficient number, since it is larger than the sum of its proper divisors (167737).

126403103 is an equidigital number, since it uses as much as digits as its factorization.

126403103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167736.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 126403103 is about 11242.9134569292. The cubic root of 126403103 is about 501.8638475117.

Adding to 126403103 its reverse (301304621), we get a palindrome (427707724).

The spelling of 126403103 in words is "one hundred twenty-six million, four hundred three thousand, one hundred three".