1644042 has 8 divisors (see below), whose sum is σ = 3288096. Its totient is φ = 548012.

The previous prime is 1644031. The next prime is 1644061. The reversal of 1644042 is 2404461.

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

1644042 is an admirable number.

It is a super-3 number, since 3×1644042³ = 13330915612308366264, which contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136998 + ... + 137009.

It is an arithmetic number, because the mean of its divisors is an integer number (411012).

2^1644042 is an apocalyptic number.

1644042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1644042 is a wasteful number, since it uses less digits than its factorization.

1644042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274012.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1644042 is about 1282.2020121650. The cubic root of 1644042 is about 118.0241739231.

The spelling of 1644042 in words is "one million, six hundred forty-four thousand, forty-two".