1284372881 has 4 divisors (see below), whose sum is σ = 1401134064. Its totient is φ = 1167611700.

The previous prime is 1284372871. The next prime is 1284372893. The reversal of 1284372881 is 1882734821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1284372881 - 2¹⁴ = 1284356497 is a prime.

It is a super-2 number, since 2×1284372881² = 3299227394896480322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1284372841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58380575 + ... + 58380596.

It is an arithmetic number, because the mean of its divisors is an integer number (350283516).

Almost surely, 2^1284372881 is an apocalyptic number.

1284372881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1284372881 is a deficient number, since it is larger than the sum of its proper divisors (116761183).

1284372881 is a wasteful number, since it uses less digits than its factorization.

1284372881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116761182.

The product of its digits is 172032, while the sum is 44.

The square root of 1284372881 is about 35838.1484036215. The cubic root of 1284372881 is about 1087.0020814092.

The spelling of 1284372881 in words is "one billion, two hundred eighty-four million, three hundred seventy-two thousand, eight hundred eighty-one".