1327665 has 16 divisors (see below), whose sum is σ = 2160576. Its totient is φ = 696000.

The previous prime is 1327631. The next prime is 1327673. The reversal of 1327665 is 5667231.

It is not a de Polignac number, because 1327665 - 2⁸ = 1327409 is a prime.

1327665 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190 + ... + 1640.

It is an arithmetic number, because the mean of its divisors is an integer number (135036).

2^1327665 is an apocalyptic number.

1327665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1327665 is a deficient number, since it is larger than the sum of its proper divisors (832911).

1327665 is a wasteful number, since it uses less digits than its factorization.

1327665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520.

The product of its digits is 7560, while the sum is 30.

The square root of 1327665 is about 1152.2434638565. The cubic root of 1327665 is about 109.9080498811.

Subtracting from 1327665 its sum of digits (30), we obtain a triangular number (1327635 = T₁₆₂₉).

The spelling of 1327665 in words is "one million, three hundred twenty-seven thousand, six hundred sixty-five".