1386091 has 4 divisors (see below), whose sum is σ = 1584112. Its totient is φ = 1188072.

The previous prime is 1386089. The next prime is 1386097. The reversal of 1386091 is 1906831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1386091 - 2¹ = 1386089 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1386097) 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, 99000 + ... + 99013.

It is an arithmetic number, because the mean of its divisors is an integer number (396028).

2^1386091 is an apocalyptic number.

1386091 is a deficient number, since it is larger than the sum of its proper divisors (198021).

1386091 is an equidigital number, since it uses as much as digits as its factorization.

1386091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198020.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1386091 is about 1177.3236598319. The cubic root of 1386091 is about 111.4971880219.

The spelling of 1386091 in words is "one million, three hundred eighty-six thousand, ninety-one".