1378855 has 8 divisors (see below), whose sum is σ = 1672272. Its totient is φ = 1091328.

The previous prime is 1378847. The next prime is 1378859. The reversal of 1378855 is 5588731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1378855 - 2³ = 1378847 is a prime.

It is a super-2 number, since 2×1378855² = 3802482222050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937 + ... + 1906.

It is an arithmetic number, because the mean of its divisors is an integer number (209034).

2^1378855 is an apocalyptic number.

1378855 is a deficient number, since it is larger than the sum of its proper divisors (293417).

1378855 is an equidigital number, since it uses as much as digits as its factorization.

1378855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945.

The product of its digits is 33600, while the sum is 37.

The square root of 1378855 is about 1174.2465669526. The cubic root of 1378855 is about 111.3028280852.

The spelling of 1378855 in words is "one million, three hundred seventy-eight thousand, eight hundred fifty-five".