1281344355 has 12 divisors (see below), whose sum is σ = 2220996960. Its totient is φ = 683383632.

The previous prime is 1281344347. The next prime is 1281344357. The reversal of 1281344355 is 5534431821.

1281344355 is a `hidden beast` number, since 1 + 281 + 344 + 35 + 5 = 666.

It is not a de Polignac number, because 1281344355 - 2³ = 1281344347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1281344357) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 14237115 + ... + 14237204.

It is an arithmetic number, because the mean of its divisors is an integer number (185083080).

Almost surely, 2^1281344355 is an apocalyptic number.

1281344355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1281344355 is a deficient number, since it is larger than the sum of its proper divisors (939652605).

1281344355 is a wasteful number, since it uses less digits than its factorization.

1281344355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28474330 (or 28474327 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 1281344355 is about 35795.8706417374. The cubic root of 1281344355 is about 1086.1470324820.

The spelling of 1281344355 in words is "one billion, two hundred eighty-one million, three hundred forty-four thousand, three hundred fifty-five".