126043 has 4 divisors (see below), whose sum is σ = 126808. Its totient is φ = 125280.

The previous prime is 126041. The next prime is 126047. The reversal of 126043 is 340621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 340621 = 103 ⋅3307.

It is a cyclic number.

It is not a de Polignac number, because 126043 - 2¹ = 126041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126041) 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, 21 + ... + 502.

It is an arithmetic number, because the mean of its divisors is an integer number (31702).

2¹²⁶⁰⁴³ is an apocalyptic number.

126043 is a deficient number, since it is larger than the sum of its proper divisors (765).

126043 is an equidigital number, since it uses as much as digits as its factorization.

126043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 126043 is about 355.0253512075. The cubic root of 126043 is about 50.1386816590.

Adding to 126043 its reverse (340621), we get a palindrome (466664).

The spelling of 126043 in words is "one hundred twenty-six thousand, forty-three".