1489666 has 4 divisors (see below), whose sum is σ = 2234502. Its totient is φ = 744832.

The previous prime is 1489661. The next prime is 1489667. The reversal of 1489666 is 6669841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6669841 = 1103 ⋅6047.

It can be written as a sum of positive squares in only one way, i.e., 758641 + 731025 = 871^2 + 855^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1489661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372415 + ... + 372418.

2^1489666 is an apocalyptic number.

1489666 is a deficient number, since it is larger than the sum of its proper divisors (744836).

1489666 is an equidigital number, since it uses as much as digits as its factorization.

1489666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744835.

The product of its digits is 62208, while the sum is 40.

The square root of 1489666 is about 1220.5187421748. The cubic root of 1489666 is about 114.2079409848.

The spelling of 1489666 in words is "one million, four hundred eighty-nine thousand, six hundred sixty-six".