1844681 has 2 divisors, whose sum is σ = 1844682. Its totient is φ = 1844680.

The previous prime is 1844677. The next prime is 1844683. The reversal of 1844681 is 1864481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1478656 + 366025 = 1216^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1844681 - 2² = 1844677 is a prime.

It is a super-2 number, since 2×1844681² = 6805695983522, which contains 22 as substring.

Together with 1844683, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1844683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 922340 + 922341.

It is an arithmetic number, because the mean of its divisors is an integer number (922341).

2^1844681 is an apocalyptic number.

It is an amenable number.

1844681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1844681 is an equidigital number, since it uses as much as digits as its factorization.

1844681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 32.

The square root of 1844681 is about 1358.1903401217. The cubic root of 1844681 is about 122.6423390569.

The spelling of 1844681 in words is "one million, eight hundred forty-four thousand, six hundred eighty-one".