1291361559 has 8 divisors (see below), whose sum is σ = 1742560512. Its totient is φ = 850535160.

The previous prime is 1291361549. The next prime is 1291361563. The reversal of 1291361559 is 9551631921.

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

It is not a de Polignac number, because 1291361559 - 2⁸ = 1291361303 is a prime.

It is a super-2 number, since 2×1291361559² = 3335229352125820962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1291361559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291361549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2592847 + ... + 2593344.

It is an arithmetic number, because the mean of its divisors is an integer number (217820064).

Almost surely, 2^1291361559 is an apocalyptic number.

1291361559 is a deficient number, since it is larger than the sum of its proper divisors (451198953).

1291361559 is an equidigital number, since it uses as much as digits as its factorization.

1291361559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5186277.

The product of its digits is 72900, while the sum is 42.

The square root of 1291361559 is about 35935.5194619474. The cubic root of 1291361559 is about 1088.9700899350.

The spelling of 1291361559 in words is "one billion, two hundred ninety-one million, three hundred sixty-one thousand, five hundred fifty-nine".