5811001 has 4 divisors (see below), whose sum is σ = 6641152. Its totient is φ = 4980852.

The previous prime is 5810993. The next prime is 5811007. The reversal of 5811001 is 1001185.

5811001 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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: 1001185 = 5 ⋅200237.

It is a cyclic number.

It is not a de Polignac number, because 5811001 - 2³ = 5810993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5811007) 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, 415065 + ... + 415078.

It is an arithmetic number, because the mean of its divisors is an integer number (1660288).

Almost surely, 2^5811001 is an apocalyptic number.

It is an amenable number.

5811001 is a deficient number, since it is larger than the sum of its proper divisors (830151).

5811001 is an equidigital number, since it uses as much as digits as its factorization.

5811001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830150.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 5811001 is about 2410.6017920843. The cubic root of 5811001 is about 179.7837010916.

Adding to 5811001 its reverse (1001185), we get a palindrome (6812186).

It can be divided in two parts, 581 and 1001, that multiplied together give a triangular number (581581 = T₁₀₇₈).

The spelling of 5811001 in words is "five million, eight hundred eleven thousand, one".