5571921 has 16 divisors (see below), whose sum is σ = 7942400. Its totient is φ = 3464208.

The previous prime is 5571919. The next prime is 5571931. The reversal of 5571921 is 1291755.

It is not a de Polignac number, because 5571921 - 2¹ = 5571919 is a prime.

It is a Duffinian number.

5571921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5571931) 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, 3090 + ... + 4548.

It is an arithmetic number, because the mean of its divisors is an integer number (496400).

Almost surely, 2^5571921 is an apocalyptic number.

It is an amenable number.

5571921 is a deficient number, since it is larger than the sum of its proper divisors (2370479).

5571921 is a wasteful number, since it uses less digits than its factorization.

5571921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548.

The product of its digits is 3150, while the sum is 30.

The square root of 5571921 is about 2360.4916860688. The cubic root of 5571921 is about 177.2834998414.

The spelling of 5571921 in words is "five million, five hundred seventy-one thousand, nine hundred twenty-one".