1280422605 has 96 divisors (see below), whose sum is σ = 2657378304. Its totient is φ = 514800000.

The previous prime is 1280422571. The next prime is 1280422607. The reversal of 1280422605 is 5062240821.

It is not a de Polignac number, because 1280422605 - 2⁷ = 1280422477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280422607) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 392230 + ... + 395480.

It is an arithmetic number, because the mean of its divisors is an integer number (27681024).

Almost surely, 2^1280422605 is an apocalyptic number.

1280422605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1280422605 is an abundant number, since it is smaller than the sum of its proper divisors (1376955699).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280422605 is a wasteful number, since it uses less digits than its factorization.

1280422605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319 (or 3308 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1280422605 is about 35782.9932370113. The cubic root of 1280422605 is about 1085.8865258291.

The spelling of 1280422605 in words is "one billion, two hundred eighty million, four hundred twenty-two thousand, six hundred five".