1280736 has 36 divisors (see below), whose sum is σ = 3642912. Its totient is φ = 426816.

The previous prime is 1280707. The next prime is 1280737. The reversal of 1280736 is 6370821.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1936 + ... + 2511.

It is an arithmetic number, because the mean of its divisors is an integer number (101192).

2^1280736 is an apocalyptic number.

1280736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1280736 is an abundant number, since it is smaller than the sum of its proper divisors (2362176).

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

1280736 is a wasteful number, since it uses less digits than its factorization.

1280736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4463 (or 4452 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1280736 is about 1131.6960722738. The cubic root of 1280736 is about 108.5975112114.

It can be divided in two parts, 1280 and 736, that added together give a triangular number (2016 = T₆₃).

The spelling of 1280736 in words is "one million, two hundred eighty thousand, seven hundred thirty-six".