126012103 has 4 divisors (see below), whose sum is σ = 144013840. Its totient is φ = 108010368.

The previous prime is 126012097. The next prime is 126012113. The reversal of 126012103 is 301210621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301210621 = 89 ⋅3384389.

It is a cyclic number.

It is not a de Polignac number, because 126012103 - 2⁵ = 126012071 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 (126012113) 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, 9000858 + ... + 9000871.

It is an arithmetic number, because the mean of its divisors is an integer number (36003460).

Almost surely, 2^126012103 is an apocalyptic number.

126012103 is a deficient number, since it is larger than the sum of its proper divisors (18001737).

126012103 is an equidigital number, since it uses as much as digits as its factorization.

126012103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18001736.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 126012103 is about 11225.5112578448. The cubic root of 126012103 is about 501.3458448198.

Adding to 126012103 its reverse (301210621), we get a palindrome (427222724).

The spelling of 126012103 in words is "one hundred twenty-six million, twelve thousand, one hundred three".