1291164441 has 8 divisors (see below), whose sum is σ = 1967488704. Its totient is φ = 737808240.

The previous prime is 1291164421. The next prime is 1291164451. The reversal of 1291164441 is 1444611921.

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

It is not a de Polignac number, because 1291164441 - 2¹⁷ = 1291033369 is a prime.

It is a super-2 number, since 2×1291164441² = 3334211227405684962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1291164421) 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, 30741990 + ... + 30742031.

It is an arithmetic number, because the mean of its divisors is an integer number (245936088).

Almost surely, 2^1291164441 is an apocalyptic number.

It is an amenable number.

1291164441 is a deficient number, since it is larger than the sum of its proper divisors (676324263).

1291164441 is an equidigital number, since it uses as much as digits as its factorization.

1291164441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61484031.

The product of its digits is 6912, while the sum is 33.

The square root of 1291164441 is about 35932.7766948228. The cubic root of 1291164441 is about 1088.9146790323.

The spelling of 1291164441 in words is "one billion, two hundred ninety-one million, one hundred sixty-four thousand, four hundred forty-one".