1662443 has 8 divisors (see below), whose sum is σ = 1780800. Its totient is φ = 1547208.

The previous prime is 1662439. The next prime is 1662449. The reversal of 1662443 is 3442661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1662443 - 2² = 1662439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380 + ... + 1862.

It is an arithmetic number, because the mean of its divisors is an integer number (222600).

2^1662443 is an apocalyptic number.

1662443 is a deficient number, since it is larger than the sum of its proper divisors (118357).

1662443 is a wasteful number, since it uses less digits than its factorization.

1662443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561.

The product of its digits is 3456, while the sum is 26.

The square root of 1662443 is about 1289.3575919814. The cubic root of 1662443 is about 118.4628712155.

The spelling of 1662443 in words is "one million, six hundred sixty-two thousand, four hundred forty-three".