1165845049 has 4 divisors (see below), whose sum is σ = 1165915764. Its totient is φ = 1165774336.

The previous prime is 1165845047. The next prime is 1165845053. The reversal of 1165845049 is 9405485611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1149684649 + 16160400 = 33907^2 + 4020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165845049 - 2¹ = 1165845047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1165844996 and 1165845014.

It is not an unprimeable number, because it can be changed into a prime (1165845041) 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, 3909 + ... + 48445.

It is an arithmetic number, because the mean of its divisors is an integer number (291478941).

Almost surely, 2^1165845049 is an apocalyptic number.

It is an amenable number.

1165845049 is a deficient number, since it is larger than the sum of its proper divisors (70715).

1165845049 is an equidigital number, since it uses as much as digits as its factorization.

1165845049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70714.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 1165845049 is about 34144.4731838112. The cubic root of 1165845049 is about 1052.4794162110.

The spelling of 1165845049 in words is "one billion, one hundred sixty-five million, eight hundred forty-five thousand, forty-nine".