1320878 has 16 divisors (see below), whose sum is σ = 2159136. Its totient is φ = 602400.

The previous prime is 1320871. The next prime is 1320881. The reversal of 1320878 is 8780231.

It is a self number, because there is not a number n which added to its sum of digits gives 1320878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375 + ... + 2877.

It is an arithmetic number, because the mean of its divisors is an integer number (134946).

2^1320878 is an apocalyptic number.

1320878 is a deficient number, since it is larger than the sum of its proper divisors (838258).

1320878 is a wasteful number, since it uses less digits than its factorization.

1320878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1320878 is about 1149.2945662449. The cubic root of 1320878 is about 109.7204471741.

The spelling of 1320878 in words is "one million, three hundred twenty thousand, eight hundred seventy-eight".