1281118041 has 24 divisors (see below), whose sum is σ = 2115800960. Its totient is φ = 731742336.

The previous prime is 1281118019. The next prime is 1281118043. The reversal of 1281118041 is 1408111821.

It is not a de Polignac number, because 1281118041 - 2¹¹ = 1281115993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1281117996 and 1281118014.

It is not an unprimeable number, because it can be changed into a prime (1281118043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266820 + ... + 271578.

Almost surely, 2^1281118041 is an apocalyptic number.

It is an amenable number.

1281118041 is a deficient number, since it is larger than the sum of its proper divisors (834682919).

1281118041 is a wasteful number, since it uses less digits than its factorization.

1281118041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9045 (or 9042 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 27.

The square root of 1281118041 is about 35792.7093274594. The cubic root of 1281118041 is about 1086.0830827843.

Adding to 1281118041 its reverse (1408111821), we get a palindrome (2689229862).

The spelling of 1281118041 in words is "one billion, two hundred eighty-one million, one hundred eighteen thousand, forty-one".