1278976 has 22 divisors (see below), whose sum is σ = 2558750. Its totient is φ = 638976.

The previous prime is 1278911. The next prime is 1278983. The reversal of 1278976 is 6798721.

It can be written as a sum of positive squares in only one way, i.e., 1048576 + 230400 = 1024^2 + 480^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400 + ... + 1648.

2^1278976 is an apocalyptic number.

1278976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279375).

1278976 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1278976 is an equidigital number, since it uses as much as digits as its factorization.

1278976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1251 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 1278976 is about 1130.9182110126. The cubic root of 1278976 is about 108.5477431514.

The spelling of 1278976 in words is "one million, two hundred seventy-eight thousand, nine hundred seventy-six".