5801821 has 16 divisors (see below), whose sum is σ = 6393600. Its totient is φ = 5246208.

The previous prime is 5801797. The next prime is 5801843. The reversal of 5801821 is 1281085.

It is a cyclic number.

It is not a de Polignac number, because 5801821 - 2¹⁵ = 5769053 is a prime.

It is a super-2 number, since 2×5801821² = 67322253832082, which contains 22 as substring.

It is a Duffinian number.

5801821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5801881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65145 + ... + 65233.

It is an arithmetic number, because the mean of its divisors is an integer number (399600).

Almost surely, 2^5801821 is an apocalyptic number.

It is an amenable number.

5801821 is a deficient number, since it is larger than the sum of its proper divisors (591779).

5801821 is a wasteful number, since it uses less digits than its factorization.

5801821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 5801821 is about 2408.6969506353. The cubic root of 5801821 is about 179.6889793602.

It can be divided in two parts, 580 and 1821, that added together give a 4-th power (2401 = 7⁴).

The spelling of 5801821 in words is "five million, eight hundred one thousand, eight hundred twenty-one".