1665323 has 6 divisors (see below), whose sum is σ = 1830612. Its totient is φ = 1513820.

The previous prime is 1665317. The next prime is 1665343. The reversal of 1665323 is 3235661.

It is not a de Polignac number, because 1665323 - 2⁸ = 1665067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1665292 and 1665301.

It is not an unprimeable number, because it can be changed into a prime (1665343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6761 + ... + 7002.

It is an arithmetic number, because the mean of its divisors is an integer number (305102).

2^1665323 is an apocalyptic number.

1665323 is a deficient number, since it is larger than the sum of its proper divisors (165289).

1665323 is a wasteful number, since it uses less digits than its factorization.

1665323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13785 (or 13774 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 1665323 is about 1290.4739439446. The cubic root of 1665323 is about 118.5312397237.

The spelling of 1665323 in words is "one million, six hundred sixty-five thousand, three hundred twenty-three".