1389841 has 2 divisors, whose sum is σ = 1389842. Its totient is φ = 1389840.

The previous prime is 1389833. The next prime is 1389851. The reversal of 1389841 is 1489831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 9216 = 1175^2 + 96^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389841 - 2³ = 1389833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389797 and 1389806.

It is not a weakly prime, because it can be changed into another prime (1389811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694920 + 694921.

It is an arithmetic number, because the mean of its divisors is an integer number (694921).

2^1389841 is an apocalyptic number.

It is an amenable number.

1389841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389841 is an equidigital number, since it uses as much as digits as its factorization.

1389841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 1389841 is about 1178.9151793068. The cubic root of 1389841 is about 111.5976475055.

The spelling of 1389841 in words is "one million, three hundred eighty-nine thousand, eight hundred forty-one".