1165036543 has 4 divisors (see below), whose sum is σ = 1270948968. Its totient is φ = 1059124120.

The previous prime is 1165036541. The next prime is 1165036553. The reversal of 1165036543 is 3456305611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1165036543 - 2¹ = 1165036541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1165036499 and 1165036508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165036541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52956196 + ... + 52956217.

It is an arithmetic number, because the mean of its divisors is an integer number (317737242).

Almost surely, 2^1165036543 is an apocalyptic number.

1165036543 is a deficient number, since it is larger than the sum of its proper divisors (105912425).

1165036543 is a wasteful number, since it uses less digits than its factorization.

1165036543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105912424.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 1165036543 is about 34132.6316448058. The cubic root of 1165036543 is about 1052.2360640589.

The spelling of 1165036543 in words is "one billion, one hundred sixty-five million, thirty-six thousand, five hundred forty-three".