1276816 has 10 divisors (see below), whose sum is σ = 2473862. Its totient is φ = 638400.

The previous prime is 1276777. The next prime is 1276817. The reversal of 1276816 is 6186721.

It can be written as a sum of positive squares in only one way, i.e., 921600 + 355216 = 960^2 + 596^2 .

It is not an unprimeable number, because it can be changed into a prime (1276817) 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 as a sum of consecutive naturals, namely, 39885 + ... + 39916.

2^1276816 is an apocalyptic number.

1276816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1276816 is a deficient number, since it is larger than the sum of its proper divisors (1197046).

1276816 is an equidigital number, since it uses as much as digits as its factorization.

1276816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79809 (or 79803 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 1276816 is about 1129.9628312471. The cubic root of 1276816 is about 108.4866017278.

The spelling of 1276816 in words is "one million, two hundred seventy-six thousand, eight hundred sixteen".