1291045988941 has 4 divisors (see below), whose sum is σ = 1291049468800. Its totient is φ = 1291042509084.

The previous prime is 1291045988927. The next prime is 1291045988977. The reversal of 1291045988941 is 1498895401921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1291045988941 - 2²⁷ = 1290911771213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1291045988941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291045988341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106571 + ... + 1951048.

It is an arithmetic number, because the mean of its divisors is an integer number (322762367200).

Almost surely, 2^{1291045988941} is an apocalyptic number.

It is an amenable number.

1291045988941 is a deficient number, since it is larger than the sum of its proper divisors (3479859).

1291045988941 is an equidigital number, since it uses as much as digits as its factorization.

1291045988941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479858.

The product of its (nonzero) digits is 7464960, while the sum is 61.

The spelling of 1291045988941 in words is "one trillion, two hundred ninety-one billion, forty-five million, nine hundred eighty-eight thousand, nine hundred forty-one".