1117665 has 32 divisors (see below), whose sum is σ = 2108160. Its totient is φ = 559872.

The previous prime is 1117661. The next prime is 1117673. The reversal of 1117665 is 5667111.

It is not a de Polignac number, because 1117665 - 2² = 1117661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

1117665 is a lucky number.

It is a plaindrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (1117661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2052 + ... + 2538.

It is an arithmetic number, because the mean of its divisors is an integer number (65880).

2^1117665 is an apocalyptic number.

1117665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1117665 is a deficient number, since it is larger than the sum of its proper divisors (990495).

1117665 is a wasteful number, since it uses less digits than its factorization.

1117665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 512 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1117665 is about 1057.1967650348. The cubic root of 1117665 is about 103.7776623389. Note that the first 3 decimals are identical.

It can be divided in two parts, 111 and 7665, that added together give a 5-th power (7776 = 6⁵).

The spelling of 1117665 in words is "one million, one hundred seventeen thousand, six hundred sixty-five".