5901721 has 4 divisors (see below), whose sum is σ = 6744832. Its totient is φ = 5058612.

The previous prime is 5901697. The next prime is 5901739. The reversal of 5901721 is 1271095.

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 5901721 - 2⁹ = 5901209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5901751) 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 3 ways as a sum of consecutive naturals, for example, 421545 + ... + 421558.

It is an arithmetic number, because the mean of its divisors is an integer number (1686208).

Almost surely, 2^5901721 is an apocalyptic number.

It is an amenable number.

5901721 is a deficient number, since it is larger than the sum of its proper divisors (843111).

5901721 is an equidigital number, since it uses as much as digits as its factorization.

5901721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843110.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 5901721 is about 2429.3457967115. The cubic root of 5901721 is about 180.7144546785.

The spelling of 5901721 in words is "five million, nine hundred one thousand, seven hundred twenty-one".