1664342 has 8 divisors (see below), whose sum is σ = 2511000. Its totient is φ = 827344.

The previous prime is 1664291. The next prime is 1664353. The reversal of 1664342 is 2434661.

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

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1967 + ... + 2682.

It is an arithmetic number, because the mean of its divisors is an integer number (313875).

2^1664342 is an apocalyptic number.

1664342 is a deficient number, since it is larger than the sum of its proper divisors (846658).

1664342 is a wasteful number, since it uses less digits than its factorization.

1664342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830.

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

The square root of 1664342 is about 1290.0937950397. The cubic root of 1664342 is about 118.5079605588.

The spelling of 1664342 in words is "one million, six hundred sixty-four thousand, three hundred forty-two".