1782061 has 2 divisors, whose sum is σ = 1782062. Its totient is φ = 1782060.

The previous prime is 1782043. The next prime is 1782071. The reversal of 1782061 is 1602871.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1196836 + 585225 = 1094^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1782061 - 2¹¹ = 1780013 is a prime.

1782061 is a lucky number.

It is equal to p₁₃₃₈₁₉ and since 1782061 and 133819 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1782071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 891030 + 891031.

It is an arithmetic number, because the mean of its divisors is an integer number (891031).

2^1782061 is an apocalyptic number.

It is an amenable number.

1782061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1782061 is an equidigital number, since it uses as much as digits as its factorization.

1782061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1782061 is about 1334.9385753659. The cubic root of 1782061 is about 121.2385839679.

The spelling of 1782061 in words is "one million, seven hundred eighty-two thousand, sixty-one".