1833421 has 4 divisors (see below), whose sum is σ = 1838592. Its totient is φ = 1828252.

The previous prime is 1833401. The next prime is 1833427. The reversal of 1833421 is 1243381.

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: 1243381 = 79 ⋅15739.

It is a cyclic number.

It is not a de Polignac number, because 1833421 - 2⁵ = 1833389 is a prime.

It is a super-2 number, since 2×1833421² = 6722865126482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1833392 and 1833401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1833427) 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, 2011 + ... + 2776.

It is an arithmetic number, because the mean of its divisors is an integer number (459648).

2^1833421 is an apocalyptic number.

It is an amenable number.

1833421 is a deficient number, since it is larger than the sum of its proper divisors (5171).

1833421 is an equidigital number, since it uses as much as digits as its factorization.

1833421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5170.

The product of its digits is 576, while the sum is 22.

The square root of 1833421 is about 1354.0387734478. The cubic root of 1833421 is about 122.3922918309.

The spelling of 1833421 in words is "one million, eight hundred thirty-three thousand, four hundred twenty-one".