5742721 has 4 divisors (see below), whose sum is σ = 5757444. Its totient is φ = 5728000.

The previous prime is 5742713. The next prime is 5742727. The reversal of 5742721 is 1272475.

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 2890000 + 2852721 = 1700^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 5742721 - 2³ = 5742713 is a prime.

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 5742721.

It is not an unprimeable number, because it can be changed into a prime (5742727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6760 + ... + 7561.

It is an arithmetic number, because the mean of its divisors is an integer number (1439361).

Almost surely, 2^5742721 is an apocalyptic number.

It is an amenable number.

5742721 is a deficient number, since it is larger than the sum of its proper divisors (14723).

5742721 is a wasteful number, since it uses less digits than its factorization.

5742721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14722.

The product of its digits is 3920, while the sum is 28.

The square root of 5742721 is about 2396.3975045889. The cubic root of 5742721 is about 179.0767645113.

It can be divided in two parts, 57 and 42721, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 5742721 in words is "five million, seven hundred forty-two thousand, seven hundred twenty-one".