1386409 has 4 divisors (see below), whose sum is σ = 1388800. Its totient is φ = 1384020.

The previous prime is 1386383. The next prime is 1386419. The reversal of 1386409 is 9046831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1386409 - 2⁵ = 1386377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1386419) 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 3 ways as a sum of consecutive naturals, for example, 292 + ... + 1690.

It is an arithmetic number, because the mean of its divisors is an integer number (347200).

2^1386409 is an apocalyptic number.

It is an amenable number.

1386409 is a deficient number, since it is larger than the sum of its proper divisors (2391).

1386409 is an equidigital number, since it uses as much as digits as its factorization.

1386409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1386409 is about 1177.4587041591. The cubic root of 1386409 is about 111.5057140120.

The spelling of 1386409 in words is "one million, three hundred eighty-six thousand, four hundred nine".