126543203 has 4 divisors (see below), whose sum is σ = 127796208. Its totient is φ = 125290200.

The previous prime is 126543191. The next prime is 126543233. The reversal of 126543203 is 302345621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302345621 = 101 ⋅2993521.

It is a cyclic number.

It is not a de Polignac number, because 126543203 - 2⁴ = 126543187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126543233) 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, 626351 + ... + 626552.

It is an arithmetic number, because the mean of its divisors is an integer number (31949052).

Almost surely, 2^126543203 is an apocalyptic number.

126543203 is a deficient number, since it is larger than the sum of its proper divisors (1253005).

126543203 is a wasteful number, since it uses less digits than its factorization.

126543203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253004.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 126543203 is about 11249.1423228618. The cubic root of 126543203 is about 502.0491941335.

Adding to 126543203 its reverse (302345621), we get a palindrome (428888824).

The spelling of 126543203 in words is "one hundred twenty-six million, five hundred forty-three thousand, two hundred three".