126126103 has 4 divisors (see below), whose sum is σ = 126256968. Its totient is φ = 125995240.

The previous prime is 126126097. The next prime is 126126139. The reversal of 126126103 is 301621621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301621621 = 7 ⋅43088803.

It is a cyclic number.

It is not a de Polignac number, because 126126103 - 2¹³ = 126117911 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 (126126163) 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 3 ways as a sum of consecutive naturals, for example, 63976 + ... + 65917.

It is an arithmetic number, because the mean of its divisors is an integer number (31564242).

Almost surely, 2^126126103 is an apocalyptic number.

126126103 is a deficient number, since it is larger than the sum of its proper divisors (130865).

126126103 is an equidigital number, since it uses as much as digits as its factorization.

126126103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130864.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 126126103 is about 11230.5878296730. The cubic root of 126126103 is about 501.4969842699.

Adding to 126126103 its reverse (301621621), we get a palindrome (427747724).

The spelling of 126126103 in words is "one hundred twenty-six million, one hundred twenty-six thousand, one hundred three".