1389481 has 2 divisors, whose sum is σ = 1389482. Its totient is φ = 1389480.

The previous prime is 1389473. The next prime is 1389491. The reversal of 1389481 is 1849831.

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., 1010025 + 379456 = 1005^2 + 616^2 .

It is an emirp because it is prime and its reverse (1849831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1389481 - 2³ = 1389473 is a prime.

It is a super-2 number, since 2×1389481² = 3861314898722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1389431) 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, 694740 + 694741.

It is an arithmetic number, because the mean of its divisors is an integer number (694741).

2^1389481 is an apocalyptic number.

It is an amenable number.

1389481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389481 is an equidigital number, since it uses as much as digits as its factorization.

1389481 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 1389481 is about 1178.7624866783. The cubic root of 1389481 is about 111.5880112420.

The spelling of 1389481 in words is "one million, three hundred eighty-nine thousand, four hundred eighty-one".