1280318 has 16 divisors (see below), whose sum is σ = 2159136. Its totient is φ = 564960.

The previous prime is 1280317. The next prime is 1280333. The reversal of 1280318 is 8130821.

It is a super-2 number, since 2×1280318² = 3278428362248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1280293 and 1280302.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (134946).

2^1280318 is an apocalyptic number.

1280318 is a deficient number, since it is larger than the sum of its proper divisors (878818).

1280318 is a wasteful number, since it uses less digits than its factorization.

1280318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1280318 is about 1131.5113786436. The cubic root of 1280318 is about 108.5856954276.

It can be divided in two parts, 12803 and 18, that added together give a palindrome (12821).

The spelling of 1280318 in words is "one million, two hundred eighty thousand, three hundred eighteen".