5818921 has 4 divisors (see below), whose sum is σ = 6125200. Its totient is φ = 5512644.

The previous prime is 5818907. The next prime is 5818949. The reversal of 5818921 is 1298185.

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 5818921 - 2⁹ = 5818409 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5818951) 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, 153111 + ... + 153148.

It is an arithmetic number, because the mean of its divisors is an integer number (1531300).

Almost surely, 2^5818921 is an apocalyptic number.

It is an amenable number.

5818921 is a deficient number, since it is larger than the sum of its proper divisors (306279).

5818921 is a wasteful number, since it uses less digits than its factorization.

5818921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306278.

The product of its digits is 5760, while the sum is 34.

The square root of 5818921 is about 2412.2439760522. The cubic root of 5818921 is about 179.8653416738.

The spelling of 5818921 in words is "five million, eight hundred eighteen thousand, nine hundred twenty-one".