1280881 has 8 divisors (see below), whose sum is σ = 1499904. Its totient is φ = 1070880.

The previous prime is 1280869. The next prime is 1280887. The reversal of 1280881 is 1880821.

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 1280881 - 2¹⁵ = 1248113 is a prime.

It is a super-2 number, since 2×1280881² = 3281312272322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1280887) 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, 1945 + ... + 2518.

It is an arithmetic number, because the mean of its divisors is an integer number (187488).

2^1280881 is an apocalyptic number.

It is an amenable number.

1280881 is a deficient number, since it is larger than the sum of its proper divisors (219023).

1280881 is an equidigital number, since it uses as much as digits as its factorization.

1280881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 1280881 is about 1131.7601335972. The cubic root of 1280881 is about 108.6016093875.

The spelling of 1280881 in words is "one million, two hundred eighty thousand, eight hundred eighty-one".