5745721 has 4 divisors (see below), whose sum is σ = 5778000. Its totient is φ = 5713444.

The previous prime is 5745713. The next prime is 5745731. The reversal of 5745721 is 1275475.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5745721 - 2³ = 5745713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5745731) 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 3 ways as a sum of consecutive naturals, for example, 15871 + ... + 16228.

It is an arithmetic number, because the mean of its divisors is an integer number (1444500).

Almost surely, 2^5745721 is an apocalyptic number.

It is an amenable number.

5745721 is a deficient number, since it is larger than the sum of its proper divisors (32279).

5745721 is a wasteful number, since it uses less digits than its factorization.

5745721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32278.

The product of its digits is 9800, while the sum is 31.

The square root of 5745721 is about 2397.0233624227. The cubic root of 5745721 is about 179.1079423433.

The spelling of 5745721 in words is "five million, seven hundred forty-five thousand, seven hundred twenty-one".