1280659 has 2 divisors, whose sum is σ = 1280660. Its totient is φ = 1280658.

The previous prime is 1280651. The next prime is 1280677. The reversal of 1280659 is 9560821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1280659 - 2³ = 1280651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1280659.

It is not a weakly prime, because it can be changed into another prime (1280651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640329 + 640330.

It is an arithmetic number, because the mean of its divisors is an integer number (640330).

2^1280659 is an apocalyptic number.

1280659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280659 is an equidigital number, since it uses as much as digits as its factorization.

1280659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1280659 is about 1131.6620520279. The cubic root of 1280659 is about 108.5953348129.

The spelling of 1280659 in words is "one million, two hundred eighty thousand, six hundred fifty-nine".