4041171721 has 4 divisors (see below), whose sum is σ = 4180522500. Its totient is φ = 3901820944.

The previous prime is 4041171707. The next prime is 4041171727. The reversal of 4041171721 is 1271711404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3204805321 + 836366400 = 56611^2 + 28920^2 .

It is a cyclic number.

It is not a de Polignac number, because 4041171721 - 2¹⁵ = 4041138953 is a prime.

It is a super-2 number, since 2×4041171721² = 32662137757220203682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4041171721.

It is not an unprimeable number, because it can be changed into a prime (4041171727) 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 3 ways as a sum of consecutive naturals, for example, 69675346 + ... + 69675403.

It is an arithmetic number, because the mean of its divisors is an integer number (1045130625).

Almost surely, 2^4041171721 is an apocalyptic number.

It is an amenable number.

4041171721 is a deficient number, since it is larger than the sum of its proper divisors (139350779).

4041171721 is a wasteful number, since it uses less digits than its factorization.

4041171721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139350778.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 4041171721 is about 63570.2109560760. The cubic root of 4041171721 is about 1592.8288079437.

The spelling of 4041171721 in words is "four billion, forty-one million, one hundred seventy-one thousand, seven hundred twenty-one".