1882781 has 2 divisors, whose sum is σ = 1882782. Its totient is φ = 1882780.

The previous prime is 1882747. The next prime is 1882787. The reversal of 1882781 is 1872881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 737881 = 1070^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 1882781 - 2⁶ = 1882717 is a prime.

It is a super-2 number, since 2×1882781² = 7089728587922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1882787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 941390 + 941391.

It is an arithmetic number, because the mean of its divisors is an integer number (941391).

2^1882781 is an apocalyptic number.

It is an amenable number.

1882781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1882781 is an equidigital number, since it uses as much as digits as its factorization.

1882781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 35.

The square root of 1882781 is about 1372.1446716728. The cubic root of 1882781 is about 123.4809424936.

The spelling of 1882781 in words is "one million, eight hundred eighty-two thousand, seven hundred eighty-one".