126331243 has 2 divisors, whose sum is σ = 126331244. Its totient is φ = 126331242.

The previous prime is 126331241. The next prime is 126331259. The reversal of 126331243 is 342133621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126331243 - 2¹ = 126331241 is a prime.

Together with 126331241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (126331241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63165621 + 63165622.

It is an arithmetic number, because the mean of its divisors is an integer number (63165622).

Almost surely, 2^126331243 is an apocalyptic number.

126331243 is a deficient number, since it is larger than the sum of its proper divisors (1).

126331243 is an equidigital number, since it uses as much as digits as its factorization.

126331243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

The square root of 126331243 is about 11239.7172117451. The cubic root of 126331243 is about 501.7687265021.

Adding to 126331243 its reverse (342133621), we get a palindrome (468464864).

The spelling of 126331243 in words is "one hundred twenty-six million, three hundred thirty-one thousand, two hundred forty-three".