1320778 has 8 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 655500.

The previous prime is 1320773. The next prime is 1320791. The reversal of 1320778 is 8770231.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1320773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2098 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (249480).

2^1320778 is an apocalyptic number.

1320778 is a deficient number, since it is larger than the sum of its proper divisors (675062).

1320778 is a wasteful number, since it uses less digits than its factorization.

1320778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1320778 is about 1149.2510604737. The cubic root of 1320778 is about 109.7176782276.

The spelling of 1320778 in words is "one million, three hundred twenty thousand, seven hundred seventy-eight".