1841641 has 2 divisors, whose sum is σ = 1841642. Its totient is φ = 1841640.

The previous prime is 1841639. The next prime is 1841657. The reversal of 1841641 is 1461481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 484416 = 1165^2 + 696^2 .

It is a cyclic number.

It is not a de Polignac number, because 1841641 - 2¹ = 1841639 is a prime.

Together with 1841639, it forms a pair of twin primes.

1841641 is a lucky number.

It is equal to p₁₃₇₉₅₀ and since 1841641 and 137950 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1841621) 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, 920820 + 920821.

It is an arithmetic number, because the mean of its divisors is an integer number (920821).

2^1841641 is an apocalyptic number.

It is an amenable number.

1841641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1841641 is an equidigital number, since it uses as much as digits as its factorization.

1841641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 25.

The square root of 1841641 is about 1357.0707424449. The cubic root of 1841641 is about 122.5749312493.

The spelling of 1841641 in words is "one million, eight hundred forty-one thousand, six hundred forty-one".