1120665 has 32 divisors (see below), whose sum is σ = 2209536. Its totient is φ = 472320.

The previous prime is 1120663. The next prime is 1120667. The reversal of 1120665 is 5660211.

It is a happy number.

1120665 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (1120663) and next prime (1120667).

It is not a de Polignac number, because 1120665 - 2¹ = 1120663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1120661) 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, 955 + ... + 1775.

It is an arithmetic number, because the mean of its divisors is an integer number (69048).

2^1120665 is an apocalyptic number.

1120665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1120665 is a deficient number, since it is larger than the sum of its proper divisors (1088871).

1120665 is a wasteful number, since it uses less digits than its factorization.

1120665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1120665 is about 1058.6146607713. The cubic root of 1120665 is about 103.8704315929.

Adding to 1120665 its reverse (5660211), we get a palindrome (6780876).

The spelling of 1120665 in words is "one million, one hundred twenty thousand, six hundred sixty-five".