5806721 has 4 divisors (see below), whose sum is σ = 5905200. Its totient is φ = 5708244.

The previous prime is 5806687. The next prime is 5806727. The reversal of 5806721 is 1276085.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1276085 = 5 ⋅255217.

It is a cyclic number.

It is not a de Polignac number, because 5806721 - 2⁶ = 5806657 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5806727) 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, 49151 + ... + 49268.

It is an arithmetic number, because the mean of its divisors is an integer number (1476300).

Almost surely, 2^5806721 is an apocalyptic number.

It is an amenable number.

5806721 is a deficient number, since it is larger than the sum of its proper divisors (98479).

5806721 is an equidigital number, since it uses as much as digits as its factorization.

5806721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98478.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 5806721 is about 2409.7138834310. The cubic root of 5806721 is about 179.7395513124.

The spelling of 5806721 in words is "five million, eight hundred six thousand, seven hundred twenty-one".