1386609 has 8 divisors (see below), whose sum is σ = 2112960. Its totient is φ = 792336.

The previous prime is 1386607. The next prime is 1386611. The reversal of 1386609 is 9066831.

It is an interprime number because it is at equal distance from previous prime (1386607) and next prime (1386611).

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

It is not a de Polignac number, because 1386609 - 2¹ = 1386607 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1386609.

It is not an unprimeable number, because it can be changed into a prime (1386607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32994 + ... + 33035.

It is an arithmetic number, because the mean of its divisors is an integer number (264120).

2^1386609 is an apocalyptic number.

It is an amenable number.

1386609 is a deficient number, since it is larger than the sum of its proper divisors (726351).

1386609 is an equidigital number, since it uses as much as digits as its factorization.

1386609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66039.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1386609 is about 1177.5436297649. The cubic root of 1386609 is about 111.5110756022.

The spelling of 1386609 in words is "one million, three hundred eighty-six thousand, six hundred nine".