1280396 has 12 divisors (see below), whose sum is σ = 2413152. Its totient is φ = 590928.

The previous prime is 1280371. The next prime is 1280399. The reversal of 1280396 is 6930821.

1280396 is a modest number, since divided by 396 gives 128 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1280399) 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, 12260 + ... + 12363.

It is an arithmetic number, because the mean of its divisors is an integer number (201096).

2^1280396 is an apocalyptic number.

It is an amenable number.

1280396 is a deficient number, since it is larger than the sum of its proper divisors (1132756).

1280396 is a wasteful number, since it uses less digits than its factorization.

1280396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24640 (or 24638 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1280396 is about 1131.5458452931. The cubic root of 1280396 is about 108.5879004820.

It can be divided in two parts, 12 and 80396, that added together give a palindrome (80408).

The spelling of 1280396 in words is "one million, two hundred eighty thousand, three hundred ninety-six".