5721505 has 4 divisors (see below), whose sum is σ = 6865812. Its totient is φ = 4577200.

The previous prime is 5721493. The next prime is 5721517. The reversal of 5721505 is 5051275.

It is a happy number.

5721505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (5721493) and next prime (5721517).

It can be written as a sum of positive squares in 2 ways, for example, as 2217121 + 3504384 = 1489^2 + 1872^2 .

It is not a de Polignac number, because 5721505 - 2¹¹ = 5719457 is a prime.

It is a Duffinian number.

5721505 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5721505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572146 + ... + 572155.

It is an arithmetic number, because the mean of its divisors is an integer number (1716453).

Almost surely, 2^5721505 is an apocalyptic number.

It is an amenable number.

5721505 is a deficient number, since it is larger than the sum of its proper divisors (1144307).

5721505 is a wasteful number, since it uses less digits than its factorization.

5721505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144306.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 5721505 is about 2391.9667639831. The cubic root of 5721505 is about 178.8559643607.

It can be divided in two parts, 5721 and 505, that added together give a palindrome (6226).

The spelling of 5721505 in words is "five million, seven hundred twenty-one thousand, five hundred five".