5721605 has 16 divisors (see below), whose sum is σ = 7366464. Its totient is φ = 4250880.

The previous prime is 5721601. The next prime is 5721619. The reversal of 5721605 is 5061275.

It is not a de Polignac number, because 5721605 - 2² = 5721601 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 (5721601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6650 + ... + 7460.

It is an arithmetic number, because the mean of its divisors is an integer number (460404).

Almost surely, 2^5721605 is an apocalyptic number.

It is an amenable number.

5721605 is a deficient number, since it is larger than the sum of its proper divisors (1644859).

5721605 is a wasteful number, since it uses less digits than its factorization.

5721605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 5721605 is about 2391.9876671923. The cubic root of 5721605 is about 178.8570063646.

The spelling of 5721605 in words is "five million, seven hundred twenty-one thousand, six hundred five".