1838021 has 8 divisors (see below), whose sum is σ = 1913088. Its totient is φ = 1764000.

The previous prime is 1837981. The next prime is 1838033. The reversal of 1838021 is 1208381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1838021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6401 + ... + 6681.

It is an arithmetic number, because the mean of its divisors is an integer number (239136).

2^1838021 is an apocalyptic number.

It is an amenable number.

1838021 is a deficient number, since it is larger than the sum of its proper divisors (75067).

1838021 is a wasteful number, since it uses less digits than its factorization.

1838021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1838021 is about 1355.7363312975. The cubic root of 1838021 is about 122.4945659119.

The spelling of 1838021 in words is "one million, eight hundred thirty-eight thousand, twenty-one".