1280507 has 4 divisors (see below), whose sum is σ = 1286376. Its totient is φ = 1274640.

The previous prime is 1280473. The next prime is 1280519. The reversal of 1280507 is 7050821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7050821 = 2287 ⋅3083.

It is a cyclic number.

It is not a de Polignac number, because 1280507 - 2¹⁰ = 1279483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2594 + ... + 3047.

It is an arithmetic number, because the mean of its divisors is an integer number (321594).

2^1280507 is an apocalyptic number.

1280507 is a deficient number, since it is larger than the sum of its proper divisors (5869).

1280507 is an equidigital number, since it uses as much as digits as its factorization.

1280507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5868.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 1280507 is about 1131.5948921765. The cubic root of 1280507 is about 108.5910382895.

The spelling of 1280507 in words is "one million, two hundred eighty thousand, five hundred seven".