1989241 has 2 divisors, whose sum is σ = 1989242. Its totient is φ = 1989240.

The previous prime is 1989233. The next prime is 1989259. The reversal of 1989241 is 1429891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1960000 + 29241 = 1400^2 + 171^2 .

It is a cyclic number.

It is not a de Polignac number, because 1989241 - 2³ = 1989233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1989197 and 1989206.

It is not a weakly prime, because it can be changed into another prime (1989341) 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, 994620 + 994621.

It is an arithmetic number, because the mean of its divisors is an integer number (994621).

2^1989241 is an apocalyptic number.

It is an amenable number.

1989241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1989241 is an equidigital number, since it uses as much as digits as its factorization.

1989241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 1989241 is about 1410.4045518928. The cubic root of 1989241 is about 125.7657738106.

The spelling of 1989241 in words is "one million, nine hundred eighty-nine thousand, two hundred forty-one".