126520543 has 2 divisors, whose sum is σ = 126520544. Its totient is φ = 126520542.

The previous prime is 126520507. The next prime is 126520561. The reversal of 126520543 is 345025621.

It is a strong prime.

It is an emirp because it is prime and its reverse (345025621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126520543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126520343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63260271 + 63260272.

It is an arithmetic number, because the mean of its divisors is an integer number (63260272).

Almost surely, 2^126520543 is an apocalyptic number.

126520543 is a deficient number, since it is larger than the sum of its proper divisors (1).

126520543 is an equidigital number, since it uses as much as digits as its factorization.

126520543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 126520543 is about 11248.1350898716. The cubic root of 126520543 is about 502.0192251490.

The spelling of 126520543 in words is "one hundred twenty-six million, five hundred twenty thousand, five hundred forty-three".