2991571 has 8 divisors (see below), whose sum is σ = 3276288. Its totient is φ = 2709000.

The previous prime is 2991559. The next prime is 2991589. The reversal of 2991571 is 1751992.

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 2991571 - 2¹⁵ = 2958803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2991511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4426 + ... + 5056.

It is an arithmetic number, because the mean of its divisors is an integer number (409536).

2^2991571 is an apocalyptic number.

2991571 is a deficient number, since it is larger than the sum of its proper divisors (284717).

2991571 is a wasteful number, since it uses less digits than its factorization.

2991571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073.

The product of its digits is 5670, while the sum is 34.

The square root of 2991571 is about 1729.6158533038. The cubic root of 2991571 is about 144.0897556432.

The spelling of 2991571 in words is "two million, nine hundred ninety-one thousand, five hundred seventy-one".