1281144641 has 12 divisors (see below), whose sum is σ = 1495825920. Its totient is φ = 1094060520.

The previous prime is 1281144617. The next prime is 1281144653. The reversal of 1281144641 is 1464411821.

It is not a de Polignac number, because 1281144641 - 2¹⁸ = 1280882497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1281144598 and 1281144607.

It is not an unprimeable number, because it can be changed into a prime (1281144611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34961 + ... + 61518.

It is an arithmetic number, because the mean of its divisors is an integer number (124652160).

Almost surely, 2^1281144641 is an apocalyptic number.

It is an amenable number.

1281144641 is a deficient number, since it is larger than the sum of its proper divisors (214681279).

1281144641 is an equidigital number, since it uses as much as digits as its factorization.

1281144641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96764 (or 96757 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 1281144641 is about 35793.0809095836. The cubic root of 1281144641 is about 1086.0905995545.

The spelling of 1281144641 in words is "one billion, two hundred eighty-one million, one hundred forty-four thousand, six hundred forty-one".