1644122 has 8 divisors (see below), whose sum is σ = 2471700. Its totient is φ = 820224.

The previous prime is 1644103. The next prime is 1644143. The reversal of 1644122 is 2214461.

It can be written as a sum of positive squares in 2 ways, for example, as 1635841 + 8281 = 1279^2 + 91^2 .

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

It is a super-3 number, since 3×1644122³ = 13332861776357111544, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1644094 and 1644103.

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, 1004 + ... + 2072.

2^1644122 is an apocalyptic number.

1644122 is a deficient number, since it is larger than the sum of its proper divisors (827578).

1644122 is a wasteful number, since it uses less digits than its factorization.

1644122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840.

The product of its digits is 384, while the sum is 20.

The square root of 1644122 is about 1282.2332081178. The cubic root of 1644122 is about 118.0260882661.

Adding to 1644122 its reverse (2214461), we get a palindrome (3858583).

The spelling of 1644122 in words is "one million, six hundred forty-four thousand, one hundred twenty-two".