1630841 has 2 divisors, whose sum is σ = 1630842. Its totient is φ = 1630840.

The previous prime is 1630829. The next prime is 1630843. The reversal of 1630841 is 1480361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958441 + 672400 = 979^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630841 - 2⁶ = 1630777 is a prime.

It is a Sophie Germain prime.

Together with 1630843, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630843) 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, 815420 + 815421.

It is an arithmetic number, because the mean of its divisors is an integer number (815421).

2^1630841 is an apocalyptic number.

It is an amenable number.

1630841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630841 is an equidigital number, since it uses as much as digits as its factorization.

1630841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1630841 is about 1277.0438520270. The cubic root of 1630841 is about 117.7074289817.

The spelling of 1630841 in words is "one million, six hundred thirty thousand, eight hundred forty-one".