1280851 has 16 divisors (see below), whose sum is σ = 1542240. Its totient is φ = 1054560.

The previous prime is 1280837. The next prime is 1280857. The reversal of 1280851 is 1580821.

It is not a de Polignac number, because 1280851 - 2¹¹ = 1278803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280857) 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, 24141 + ... + 24193.

It is an arithmetic number, because the mean of its divisors is an integer number (96390).

2^1280851 is an apocalyptic number.

1280851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1280851 is a deficient number, since it is larger than the sum of its proper divisors (261389).

1280851 is an equidigital number, since it uses as much as digits as its factorization.

1280851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1280851 is about 1131.7468798278. The cubic root of 1280851 is about 108.6007615144.

The spelling of 1280851 in words is "one million, two hundred eighty thousand, eight hundred fifty-one".