1278039 has 8 divisors (see below), whose sum is σ = 1947520. Its totient is φ = 730296.

The previous prime is 1278031. The next prime is 1278047. The reversal of 1278039 is 9308721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1278031) and next prime (1278047).

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

It is not a de Polignac number, because 1278039 - 2³ = 1278031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1277997 and 1278015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278031) 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, 30409 + ... + 30450.

It is an arithmetic number, because the mean of its divisors is an integer number (243440).

2^1278039 is an apocalyptic number.

1278039 is a deficient number, since it is larger than the sum of its proper divisors (669481).

1278039 is an equidigital number, since it uses as much as digits as its factorization.

1278039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60869.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1278039 is about 1130.5038699624. The cubic root of 1278039 is about 108.5212286890.

The spelling of 1278039 in words is "one million, two hundred seventy-eight thousand, thirty-nine".