1320165 has 64 divisors (see below), whose sum is σ = 2949120. Its totient is φ = 544320.

The previous prime is 1320161. The next prime is 1320173. The reversal of 1320165 is 5610231.

It is not a de Polignac number, because 1320165 - 2² = 1320161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10332 + ... + 10458.

It is an arithmetic number, because the mean of its divisors is an integer number (46080).

2^1320165 is an apocalyptic number.

1320165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320165 is an abundant number, since it is smaller than the sum of its proper divisors (1628955).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320165 is a wasteful number, since it uses less digits than its factorization.

1320165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1320165 is about 1148.9843340969. The cubic root of 1320165 is about 109.7007015303.

Adding to 1320165 its reverse (5610231), we get a palindrome (6930396).

It can be divided in two parts, 1320 and 165, that added together give a triangular number (1485 = T₅₄).

The spelling of 1320165 in words is "one million, three hundred twenty thousand, one hundred sixty-five".