1386139 has 2 divisors, whose sum is σ = 1386140. Its totient is φ = 1386138.

The previous prime is 1386097. The next prime is 1386149. The reversal of 1386139 is 9316831.

It is a strong prime.

It is an emirp because it is prime and its reverse (9316831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1386139 - 2¹¹ = 1384091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1386139.

It is not a weakly prime, because it can be changed into another prime (1386149) 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 as a sum of consecutive naturals, namely, 693069 + 693070.

It is an arithmetic number, because the mean of its divisors is an integer number (693070).

2^1386139 is an apocalyptic number.

1386139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386139 is an equidigital number, since it uses as much as digits as its factorization.

1386139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 1386139 is about 1177.3440448739. The cubic root of 1386139 is about 111.4984750473.

The spelling of 1386139 in words is "one million, three hundred eighty-six thousand, one hundred thirty-nine".