1826221 has 4 divisors (see below), whose sum is σ = 1860732. Its totient is φ = 1791712.

The previous prime is 1826207. The next prime is 1826239. The reversal of 1826221 is 1226281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1240996 + 585225 = 1114^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1826221 - 2⁵ = 1826189 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1826192 and 1826201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1826281) 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, 17176 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (465183).

2^1826221 is an apocalyptic number.

It is an amenable number.

1826221 is a deficient number, since it is larger than the sum of its proper divisors (34511).

1826221 is an equidigital number, since it uses as much as digits as its factorization.

1826221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34510.

The product of its digits is 384, while the sum is 22.

The square root of 1826221 is about 1351.3774454237. The cubic root of 1826221 is about 122.2318666708.

The spelling of 1826221 in words is "one million, eight hundred twenty-six thousand, two hundred twenty-one".