1823021 has 2 divisors, whose sum is σ = 1823022. Its totient is φ = 1823020.

The previous prime is 1823011. The next prime is 1823033. The reversal of 1823021 is 1203281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1276900 + 546121 = 1130^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1823021 - 2¹⁰ = 1821997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1823011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911510 + 911511.

It is an arithmetic number, because the mean of its divisors is an integer number (911511).

2^1823021 is an apocalyptic number.

It is an amenable number.

1823021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1823021 is an equidigital number, since it uses as much as digits as its factorization.

1823021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1823021 is about 1350.1929491743. The cubic root of 1823021 is about 122.1604312393.

The spelling of 1823021 in words is "one million, eight hundred twenty-three thousand, twenty-one".