1255540543 has 2 divisors, whose sum is σ = 1255540544. Its totient is φ = 1255540542.

The previous prime is 1255540523. The next prime is 1255540607. The reversal of 1255540543 is 3450455521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1255540543 - 2⁵ = 1255540511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1255540499 and 1255540508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255540523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627770271 + 627770272.

It is an arithmetic number, because the mean of its divisors is an integer number (627770272).

Almost surely, 2^1255540543 is an apocalyptic number.

1255540543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255540543 is an equidigital number, since it uses as much as digits as its factorization.

1255540543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60000, while the sum is 34.

The square root of 1255540543 is about 35433.6075357844. The cubic root of 1255540543 is about 1078.8065643589.

The spelling of 1255540543 in words is "one billion, two hundred fifty-five million, five hundred forty thousand, five hundred forty-three".