1165405543 has 2 divisors, whose sum is σ = 1165405544. Its totient is φ = 1165405542.

The previous prime is 1165405523. The next prime is 1165405567. The reversal of 1165405543 is 3455045611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1165405543 - 2⁵ = 1165405511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1165405499 and 1165405508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165405523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582702771 + 582702772.

It is an arithmetic number, because the mean of its divisors is an integer number (582702772).

Almost surely, 2^1165405543 is an apocalyptic number.

1165405543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165405543 is an equidigital number, since it uses as much as digits as its factorization.

1165405543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 1165405543 is about 34138.0366014216. The cubic root of 1165405543 is about 1052.3471432992.

The spelling of 1165405543 in words is "one billion, one hundred sixty-five million, four hundred five thousand, five hundred forty-three".