1144963281 has 32 divisors (see below), whose sum is σ = 1907877888. Its totient is φ = 593360640.

The previous prime is 1144963249. The next prime is 1144963289. The reversal of 1144963281 is 1823694411.

It is not a de Polignac number, because 1144963281 - 2⁵ = 1144963249 is a prime.

It is a super-2 number, since 2×1144963281² = 2621881829676569922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1144963289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94300 + ... + 105746.

It is an arithmetic number, because the mean of its divisors is an integer number (59621184).

Almost surely, 2^1144963281 is an apocalyptic number.

1144963281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1144963281 is a deficient number, since it is larger than the sum of its proper divisors (762914607).

1144963281 is a wasteful number, since it uses less digits than its factorization.

1144963281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11901.

The product of its digits is 41472, while the sum is 39.

The square root of 1144963281 is about 33837.3060541173. The cubic root of 1144963281 is about 1046.1577733024.

The spelling of 1144963281 in words is "one billion, one hundred forty-four million, nine hundred sixty-three thousand, two hundred eighty-one".