5721001 has 12 divisors (see below), whose sum is σ = 6773956. Its totient is φ = 4799520.

The previous prime is 5720999. The next prime is 5721011. The reversal of 5721001 is 1001275.

It can be written as a sum of positive squares in 2 ways, for example, as 435600 + 5285401 = 660^2 + 2299^2 .

It is not a de Polignac number, because 5721001 - 2¹ = 5720999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5721011) 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 11 ways as a sum of consecutive naturals, for example, 246 + ... + 3391.

Almost surely, 2^5721001 is an apocalyptic number.

It is an amenable number.

5721001 is a deficient number, since it is larger than the sum of its proper divisors (1052955).

5721001 is a wasteful number, since it uses less digits than its factorization.

5721001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672 (or 3661 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 5721001 is about 2391.8614090285. The cubic root of 5721001 is about 178.8507124760.

Adding to 5721001 its reverse (1001275), we get a palindrome (6722276).

The spelling of 5721001 in words is "five million, seven hundred twenty-one thousand, one".