1281152235 has 96 divisors (see below), whose sum is σ = 2402426880. Its totient is φ = 580884480.

The previous prime is 1281152231. The next prime is 1281152281. The reversal of 1281152235 is 5322511821.

It is not a de Polignac number, because 1281152235 - 2² = 1281152231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1281152231) 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 95 ways as a sum of consecutive naturals, for example, 3344854 + ... + 3345236.

It is an arithmetic number, because the mean of its divisors is an integer number (25025280).

Almost surely, 2^1281152235 is an apocalyptic number.

1281152235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1281152235 is a deficient number, since it is larger than the sum of its proper divisors (1121274645).

1281152235 is a wasteful number, since it uses less digits than its factorization.

1281152235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 518 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 1281152235 is about 35793.1869913815. The cubic root of 1281152235 is about 1086.0927454886.

The spelling of 1281152235 in words is "one billion, two hundred eighty-one million, one hundred fifty-two thousand, two hundred thirty-five".