1814021 has 4 divisors (see below), whose sum is σ = 1978944. Its totient is φ = 1649100.

The previous prime is 1814011. The next prime is 1814023. The reversal of 1814021 is 1204181.

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: 1204181 = 11 ⋅109471.

It is a cyclic number.

It is not a de Polignac number, because 1814021 - 2¹⁴ = 1797637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1814023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82445 + ... + 82466.

It is an arithmetic number, because the mean of its divisors is an integer number (494736).

2^1814021 is an apocalyptic number.

1814021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1814021 is a deficient number, since it is larger than the sum of its proper divisors (164923).

1814021 is a wasteful number, since it uses less digits than its factorization.

1814021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164922.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1814021 is about 1346.8559685430. The cubic root of 1814021 is about 121.9590698494.

The spelling of 1814021 in words is "one million, eight hundred fourteen thousand, twenty-one".