1280329 has 8 divisors (see below), whose sum is σ = 1319360. Its totient is φ = 1242000.

The previous prime is 1280317. The next prime is 1280333. The reversal of 1280329 is 9230821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1280329 - 2⁵ = 1280297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8404 + ... + 8554.

It is an arithmetic number, because the mean of its divisors is an integer number (164920).

2^1280329 is an apocalyptic number.

It is an amenable number.

1280329 is a deficient number, since it is larger than the sum of its proper divisors (39031).

1280329 is a wasteful number, since it uses less digits than its factorization.

1280329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1280329 is about 1131.5162393885. The cubic root of 1280329 is about 108.5860064023.

The spelling of 1280329 in words is "one million, two hundred eighty thousand, three hundred twenty-nine".