1820573 has 2 divisors, whose sum is σ = 1820574. Its totient is φ = 1820572.

The previous prime is 1820557. The next prime is 1820579. The reversal of 1820573 is 3750281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1444804 + 375769 = 1202^2 + 613^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820573 - 2⁴ = 1820557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1820579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910286 + 910287.

It is an arithmetic number, because the mean of its divisors is an integer number (910287).

2^1820573 is an apocalyptic number.

It is an amenable number.

1820573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820573 is an equidigital number, since it uses as much as digits as its factorization.

1820573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1820573 is about 1349.2861075398. The cubic root of 1820573 is about 122.1057266779.

The spelling of 1820573 in words is "one million, eight hundred twenty thousand, five hundred seventy-three".