1001291291 has 16 divisors (see below), whose sum is σ = 1344392448. Its totient is φ = 720208800.

The previous prime is 1001291273. The next prime is 1001291297. The reversal of 1001291291 is 1921921001.

It is a cyclic number.

It is not a de Polignac number, because 1001291291 - 2¹⁰ = 1001290267 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001291291.

It is not an unprimeable number, because it can be changed into a prime (1001291297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499145 + ... + 501146.

It is an arithmetic number, because the mean of its divisors is an integer number (84024528).

Almost surely, 2^1001291291 is an apocalyptic number.

1001291291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001291291 is a deficient number, since it is larger than the sum of its proper divisors (343101157).

1001291291 is a wasteful number, since it uses less digits than its factorization.

1001291291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000322.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 1001291291 is about 31643.1871182408. The cubic root of 1001291291 is about 1000.4302451959.

It can be divided in two parts, 1001 and 291291, that added together give a palindrome (292292).

The spelling of 1001291291 in words is "one billion, one million, two hundred ninety-one thousand, two hundred ninety-one".