1378139 has 16 divisors (see below), whose sum is σ = 1718208. Its totient is φ = 1078272.

The previous prime is 1378129. The next prime is 1378141. The reversal of 1378139 is 9318731.

It is a cyclic number.

It is not a de Polignac number, because 1378139 - 2¹⁶ = 1312603 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378129) 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 15 ways as a sum of consecutive naturals, for example, 4247 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (107388).

2^1378139 is an apocalyptic number.

1378139 is a deficient number, since it is larger than the sum of its proper divisors (340069).

1378139 is a wasteful number, since it uses less digits than its factorization.

1378139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374.

The product of its digits is 4536, while the sum is 32.

The square root of 1378139 is about 1173.9416510202. The cubic root of 1378139 is about 111.2835592902.

The spelling of 1378139 in words is "one million, three hundred seventy-eight thousand, one hundred thirty-nine".