1606443 has 4 divisors (see below), whose sum is σ = 2141928. Its totient is φ = 1070960.

The previous prime is 1606439. The next prime is 1606457. The reversal of 1606443 is 3446061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3446061 = 3 ⋅1148687.

It is a cyclic number.

It is not a de Polignac number, because 1606443 - 2² = 1606439 is a prime.

It is a super-2 number, since 2×1606443² = 5161318224498, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1606403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267738 + ... + 267743.

It is an arithmetic number, because the mean of its divisors is an integer number (535482).

2^1606443 is an apocalyptic number.

1606443 is a deficient number, since it is larger than the sum of its proper divisors (535485).

1606443 is an equidigital number, since it uses as much as digits as its factorization.

1606443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535484.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1606443 is about 1267.4553246565. The cubic root of 1606443 is about 117.1174946508.

The spelling of 1606443 in words is "one million, six hundred six thousand, four hundred forty-three".