1321065 has 24 divisors (see below), whose sum is σ = 2366208. Its totient is φ = 681120.

The previous prime is 1321063. The next prime is 1321079. The reversal of 1321065 is 5601231.

It is not a de Polignac number, because 1321065 - 2¹ = 1321063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 922 + ... + 1868.

It is an arithmetic number, because the mean of its divisors is an integer number (98592).

2^1321065 is an apocalyptic number.

1321065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1321065 is a deficient number, since it is larger than the sum of its proper divisors (1045143).

1321065 is a wasteful number, since it uses less digits than its factorization.

1321065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 986 counting only the distinct ones).

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

The square root of 1321065 is about 1149.3759176179. The cubic root of 1321065 is about 109.7256247291.

Adding to 1321065 its reverse (5601231), we get a palindrome (6922296).

The spelling of 1321065 in words is "one million, three hundred twenty-one thousand, sixty-five".