1383665 has 8 divisors (see below), whose sum is σ = 1674240. Its totient is φ = 1097712.

The previous prime is 1383659. The next prime is 1383667. The reversal of 1383665 is 5663831.

1383665 = T₄₂₂ + T₄₂₃ + ... + T₄₃₆.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1383665 - 2²⁰ = 335089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1383667) 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 7 ways as a sum of consecutive naturals, for example, 455 + ... + 1724.

It is an arithmetic number, because the mean of its divisors is an integer number (209280).

2^1383665 is an apocalyptic number.

It is an amenable number.

1383665 is a deficient number, since it is larger than the sum of its proper divisors (290575).

1383665 is a wasteful number, since it uses less digits than its factorization.

1383665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311.

The product of its digits is 12960, while the sum is 32.

The square root of 1383665 is about 1176.2929056999. The cubic root of 1383665 is about 111.4321008713.

It can be divided in two parts, 1383 and 665, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1383665 in words is "one million, three hundred eighty-three thousand, six hundred sixty-five".