1281834399 has 4 divisors (see below), whose sum is σ = 1709112536. Its totient is φ = 854556264.

The previous prime is 1281834383. The next prime is 1281834403. The reversal of 1281834399 is 9934381821.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1281834399 - 2⁴ = 1281834383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281834199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213639064 + ... + 213639069.

It is an arithmetic number, because the mean of its divisors is an integer number (427278134).

Almost surely, 2^1281834399 is an apocalyptic number.

1281834399 is a deficient number, since it is larger than the sum of its proper divisors (427278137).

1281834399 is an equidigital number, since it uses as much as digits as its factorization.

1281834399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427278136.

The product of its digits is 373248, while the sum is 48.

The square root of 1281834399 is about 35802.7149668848. The cubic root of 1281834399 is about 1086.2854787411.

The spelling of 1281834399 in words is "one billion, two hundred eighty-one million, eight hundred thirty-four thousand, three hundred ninety-nine".