1841681 has 2 divisors, whose sum is σ = 1841682. Its totient is φ = 1841680.

The previous prime is 1841659. The next prime is 1841699. The reversal of 1841681 is 1861481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1500625 + 341056 = 1225^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1841681 - 2¹⁴ = 1825297 is a prime.

It is a super-2 number, since 2×1841681² = 6783577811522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1841621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920840 + 920841.

It is an arithmetic number, because the mean of its divisors is an integer number (920841).

2^1841681 is an apocalyptic number.

It is an amenable number.

1841681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1841681 is an equidigital number, since it uses as much as digits as its factorization.

1841681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 29.

The square root of 1841681 is about 1357.0854799901. The cubic root of 1841681 is about 122.5758186756.

The spelling of 1841681 in words is "one million, eight hundred forty-one thousand, six hundred eighty-one".