1278055 has 8 divisors (see below), whose sum is σ = 1539792. Its totient is φ = 1018368.

The previous prime is 1278047. The next prime is 1278097. The reversal of 1278055 is 5508721.

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 1278055 - 2³ = 1278047 is a prime.

It is a Duffinian number.

1278055 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1927 + ... + 2503.

It is an arithmetic number, because the mean of its divisors is an integer number (192474).

2^1278055 is an apocalyptic number.

1278055 is a deficient number, since it is larger than the sum of its proper divisors (261737).

1278055 is an equidigital number, since it uses as much as digits as its factorization.

1278055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1278055 is about 1130.5109464309. The cubic root of 1278055 is about 108.5216815527.

The spelling of 1278055 in words is "one million, two hundred seventy-eight thousand, fifty-five".