126540563 has 2 divisors, whose sum is σ = 126540564. Its totient is φ = 126540562.

The previous prime is 126540527. The next prime is 126540569. The reversal of 126540563 is 365045621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126540563 - 2¹² = 126536467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126540569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63270281 + 63270282.

It is an arithmetic number, because the mean of its divisors is an integer number (63270282).

Almost surely, 2^126540563 is an apocalyptic number.

126540563 is a deficient number, since it is larger than the sum of its proper divisors (1).

126540563 is an equidigital number, since it uses as much as digits as its factorization.

126540563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 126540563 is about 11249.0249799705. The cubic root of 126540563 is about 502.0457027855.

The spelling of 126540563 in words is "one hundred twenty-six million, five hundred forty thousand, five hundred sixty-three".