1280807 has 4 divisors (see below), whose sum is σ = 1397256. Its totient is φ = 1164360.

The previous prime is 1280803. The next prime is 1280821. The reversal of 1280807 is 7080821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1280807 - 2² = 1280803 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 (1280803) 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 3 ways as a sum of consecutive naturals, for example, 58208 + ... + 58229.

It is an arithmetic number, because the mean of its divisors is an integer number (349314).

2^1280807 is an apocalyptic number.

1280807 is a deficient number, since it is larger than the sum of its proper divisors (116449).

1280807 is a wasteful number, since it uses less digits than its factorization.

1280807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116448.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 1280807 is about 1131.7274406853. The cubic root of 1280807 is about 108.5995179432.

The spelling of 1280807 in words is "one million, two hundred eighty thousand, eight hundred seven".