1378115 has 4 divisors (see below), whose sum is σ = 1653744. Its totient is φ = 1102488.

The previous prime is 1378103. The next prime is 1378129. The reversal of 1378115 is 5118731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5118731 = 137 ⋅37363.

It is a cyclic number.

It is not a de Polignac number, because 1378115 - 2⁴ = 1378099 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137807 + ... + 137816.

It is an arithmetic number, because the mean of its divisors is an integer number (413436).

2^1378115 is an apocalyptic number.

1378115 is a deficient number, since it is larger than the sum of its proper divisors (275629).

1378115 is an equidigital number, since it uses as much as digits as its factorization.

1378115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275628.

The product of its digits is 840, while the sum is 26.

The square root of 1378115 is about 1173.9314290026. The cubic root of 1378115 is about 111.2829132933.

The spelling of 1378115 in words is "one million, three hundred seventy-eight thousand, one hundred fifteen".