1165787 has 4 divisors (see below), whose sum is σ = 1332336. Its totient is φ = 999240.

The previous prime is 1165777. The next prime is 1165789. The reversal of 1165787 is 7875611.

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 1165787 - 2⁸ = 1165531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165789) 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, 83264 + ... + 83277.

It is an arithmetic number, because the mean of its divisors is an integer number (333084).

2^1165787 is an apocalyptic number.

1165787 is a deficient number, since it is larger than the sum of its proper divisors (166549).

1165787 is an equidigital number, since it uses as much as digits as its factorization.

1165787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166548.

The product of its digits is 11760, while the sum is 35.

The square root of 1165787 is about 1079.7161664067. The cubic root of 1165787 is about 105.2461947797.

The spelling of 1165787 in words is "one million, one hundred sixty-five thousand, seven hundred eighty-seven".