5821861 has 4 divisors (see below), whose sum is σ = 5848192. Its totient is φ = 5795532.

The previous prime is 5821859. The next prime is 5821889. The reversal of 5821861 is 1681285.

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 5821861 - 2¹ = 5821859 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5821841) 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, 12831 + ... + 13276.

It is an arithmetic number, because the mean of its divisors is an integer number (1462048).

Almost surely, 2^5821861 is an apocalyptic number.

It is an amenable number.

5821861 is a deficient number, since it is larger than the sum of its proper divisors (26331).

5821861 is a wasteful number, since it uses less digits than its factorization.

5821861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26330.

The product of its digits is 3840, while the sum is 31.

The square root of 5821861 is about 2412.8532901940. The cubic root of 5821861 is about 179.8956287935.

The spelling of 5821861 in words is "five million, eight hundred twenty-one thousand, eight hundred sixty-one".