1326644 has 18 divisors (see below), whose sum is σ = 2552802. Its totient is φ = 602800.

The previous prime is 1326641. The next prime is 1326649. The reversal of 1326644 is 4466231.

It can be written as a sum of positive squares in only one way, i.e., 1024144 + 302500 = 1012^2 + 550^2 .

It is a d-powerful number, because it can be written as 1 + 3⁵ + 2⁷ + 6⁵ + 6⁵ + 4⁹ + 4¹⁰ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 887 + ... + 1854.

2^1326644 is an apocalyptic number.

It is an amenable number.

1326644 is a deficient number, since it is larger than the sum of its proper divisors (1226158).

1326644 is a wasteful number, since it uses less digits than its factorization.

1326644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767 (or 2754 counting only the distinct ones).

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

The square root of 1326644 is about 1151.8003299183. The cubic root of 1326644 is about 109.8798688524.

It can be divided in two parts, 132 and 6644, that added together give a palindrome (6776).

The spelling of 1326644 in words is "one million, three hundred twenty-six thousand, six hundred forty-four".