1280449 has 4 divisors (see below), whose sum is σ = 1282864. Its totient is φ = 1278036.

The previous prime is 1280431. The next prime is 1280453. The reversal of 1280449 is 9440821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1280449 - 2⁵ = 1280417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280549) 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, 27 + ... + 1600.

It is an arithmetic number, because the mean of its divisors is an integer number (320716).

2^1280449 is an apocalyptic number.

It is an amenable number.

1280449 is a deficient number, since it is larger than the sum of its proper divisors (2415).

1280449 is an equidigital number, since it uses as much as digits as its factorization.

1280449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1280449 is about 1131.5692643405. The cubic root of 1280449 is about 108.5893987370.

The spelling of 1280449 in words is "one million, two hundred eighty thousand, four hundred forty-nine".