1280335 has 16 divisors (see below), whose sum is σ = 1774656. Its totient is φ = 868608.

The previous prime is 1280333. The next prime is 1280371. The reversal of 1280335 is 5330821.

It is a cyclic number.

It is not a de Polignac number, because 1280335 - 2¹ = 1280333 is a prime.

It is a Duffinian number.

1280335 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280333) 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 15 ways as a sum of consecutive naturals, for example, 5379 + ... + 5611.

It is an arithmetic number, because the mean of its divisors is an integer number (110916).

2^1280335 is an apocalyptic number.

1280335 is a deficient number, since it is larger than the sum of its proper divisors (494321).

1280335 is a wasteful number, since it uses less digits than its factorization.

1280335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1280335 is about 1131.5188906952. The cubic root of 1280335 is about 108.5861760240.

The spelling of 1280335 in words is "one million, two hundred eighty thousand, three hundred thirty-five".