1283280891 has 16 divisors (see below), whose sum is σ = 1749678624. Its totient is φ = 836319744.

The previous prime is 1283280877. The next prime is 1283280913. The reversal of 1283280891 is 1980823821.

It is not a de Polignac number, because 1283280891 - 2¹⁵ = 1283248123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1283280841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29475 + ... + 58611.

It is an arithmetic number, because the mean of its divisors is an integer number (109354914).

Almost surely, 2^1283280891 is an apocalyptic number.

1283280891 is a deficient number, since it is larger than the sum of its proper divisors (466397733).

1283280891 is a wasteful number, since it uses less digits than its factorization.

1283280891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29470.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 1283280891 is about 35822.9101414165. The cubic root of 1283280891 is about 1086.6939331088.

The spelling of 1283280891 in words is "one billion, two hundred eighty-three million, two hundred eighty thousand, eight hundred ninety-one".