1478689 has 2 divisors, whose sum is σ = 1478690. Its totient is φ = 1478688.

The previous prime is 1478683. The next prime is 1478699. The reversal of 1478689 is 9868741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1192464 + 286225 = 1092^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1478689 - 2¹¹ = 1476641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1478683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739344 + 739345.

It is an arithmetic number, because the mean of its divisors is an integer number (739345).

2^1478689 is an apocalyptic number.

It is an amenable number.

1478689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1478689 is an equidigital number, since it uses as much as digits as its factorization.

1478689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 1478689 is about 1216.0135690032. The cubic root of 1478689 is about 113.9267252522.

It can be divided in two parts, 147 and 8689, that added together give a square (8836 = 94²).

The spelling of 1478689 in words is "one million, four hundred seventy-eight thousand, six hundred eighty-nine".