1266142543 has 2 divisors, whose sum is σ = 1266142544. Its totient is φ = 1266142542.

The previous prime is 1266142519. The next prime is 1266142547. The reversal of 1266142543 is 3452416621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1266142543 - 2¹³ = 1266134351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1266142499 and 1266142508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266142547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633071271 + 633071272.

It is an arithmetic number, because the mean of its divisors is an integer number (633071272).

Almost surely, 2^1266142543 is an apocalyptic number.

1266142543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266142543 is an equidigital number, since it uses as much as digits as its factorization.

1266142543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 1266142543 is about 35582.8967764009. The cubic root of 1266142543 is about 1081.8345998439.

The spelling of 1266142543 in words is "one billion, two hundred sixty-six million, one hundred forty-two thousand, five hundred forty-three".