1280316 has 12 divisors (see below), whose sum is σ = 2987432. Its totient is φ = 426768.

The previous prime is 1280309. The next prime is 1280317. The reversal of 1280316 is 6130821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1280292 and 1280301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280317) 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, 53335 + ... + 53358.

2^1280316 is an apocalyptic number.

It is an amenable number.

1280316 is an abundant number, since it is smaller than the sum of its proper divisors (1707116).

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

1280316 is a wasteful number, since it uses less digits than its factorization.

1280316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106700 (or 106698 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1280316 is about 1131.5104948696. The cubic root of 1280316 is about 108.5856388866.

It can be divided in two parts, 1280 and 316, that added together give a triangular number (1596 = T₅₆).

The spelling of 1280316 in words is "one million, two hundred eighty thousand, three hundred sixteen".