1280830605 has 32 divisors (see below), whose sum is σ = 2102575104. Its totient is φ = 665495616.

The previous prime is 1280830589. The next prime is 1280830631. The reversal of 1280830605 is 5060380821.

It is a happy number.

It is not a de Polignac number, because 1280830605 - 2⁴ = 1280830589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153142 + ... + 161288.

It is an arithmetic number, because the mean of its divisors is an integer number (65705472).

Almost surely, 2^1280830605 is an apocalyptic number.

1280830605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1280830605 is a deficient number, since it is larger than the sum of its proper divisors (821744499).

1280830605 is a wasteful number, since it uses less digits than its factorization.

1280830605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8425.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1280830605 is about 35788.6938152261. The cubic root of 1280830605 is about 1086.0018509443.

The spelling of 1280830605 in words is "one billion, two hundred eighty million, eight hundred thirty thousand, six hundred five".