1291247041 has 8 divisors (see below), whose sum is σ = 1476019584. Its totient is φ = 1106551680.

The previous prime is 1291247017. The next prime is 1291247059. The reversal of 1291247041 is 1407421921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1291247041 - 2¹⁹ = 1290722753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1291246994 and 1291247012.

It is not an unprimeable number, because it can be changed into a prime (1291547041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22641 + ... + 55633.

It is an arithmetic number, because the mean of its divisors is an integer number (184502448).

Almost surely, 2^1291247041 is an apocalyptic number.

It is an amenable number.

1291247041 is a deficient number, since it is larger than the sum of its proper divisors (184772543).

1291247041 is an equidigital number, since it uses as much as digits as its factorization.

1291247041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38591.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1291247041 is about 35933.9260448952. The cubic root of 1291247041 is about 1088.9378990115.

Adding to 1291247041 its reverse (1407421921), we get a palindrome (2698668962).

The spelling of 1291247041 in words is "one billion, two hundred ninety-one million, two hundred forty-seven thousand, forty-one".