1854021 has 16 divisors (see below), whose sum is σ = 2689344. Its totient is φ = 1129344.

The previous prime is 1854019. The next prime is 1854029. The reversal of 1854021 is 1204581.

It is not a de Polignac number, because 1854021 - 2¹ = 1854019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1854029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5170 + ... + 5516.

It is an arithmetic number, because the mean of its divisors is an integer number (168084).

2^1854021 is an apocalyptic number.

It is an amenable number.

1854021 is a deficient number, since it is larger than the sum of its proper divisors (835323).

1854021 is a wasteful number, since it uses less digits than its factorization.

1854021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1854021 is about 1361.6243975488. The cubic root of 1854021 is about 122.8489785066.

The spelling of 1854021 in words is "one million, eight hundred fifty-four thousand, twenty-one".