881641 has 2 divisors, whose sum is σ = 881642. Its totient is φ = 881640.

The previous prime is 881611. The next prime is 881663. The reversal of 881641 is 146188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 646416 + 235225 = 804^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 881641 - 2¹⁹ = 357353 is a prime.

It is not a weakly prime, because it can be changed into another prime (881611) 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, 440820 + 440821.

It is an arithmetic number, because the mean of its divisors is an integer number (440821).

2⁸⁸¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

881641 is a deficient number, since it is larger than the sum of its proper divisors (1).

881641 is an equidigital number, since it uses as much as digits as its factorization.

881641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 28.

The square root of 881641 is about 938.9574005246. The cubic root of 881641 is about 95.8879262143.

The spelling of 881641 in words is "eight hundred eighty-one thousand, six hundred forty-one".