1280849 has 4 divisors (see below), whose sum is σ = 1283136. Its totient is φ = 1278564.

The previous prime is 1280837. The next prime is 1280857. The reversal of 1280849 is 9480821.

It is a happy number.

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 1280849 - 2⁴ = 1280833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280869) 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, 332 + ... + 1634.

It is an arithmetic number, because the mean of its divisors is an integer number (320784).

2^1280849 is an apocalyptic number.

It is an amenable number.

1280849 is a deficient number, since it is larger than the sum of its proper divisors (2287).

1280849 is an equidigital number, since it uses as much as digits as its factorization.

1280849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1280849 is about 1131.7459962377. The cubic root of 1280849 is about 108.6007049891.

The spelling of 1280849 in words is "one million, two hundred eighty thousand, eight hundred forty-nine".