1325664 has 36 divisors (see below), whose sum is σ = 3770676. Its totient is φ = 441792.

The previous prime is 1325663. The next prime is 1325669. The reversal of 1325664 is 4665231.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325663) 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, 2014 + ... + 2589.

It is an arithmetic number, because the mean of its divisors is an integer number (104741).

2^1325664 is an apocalyptic number.

It is an amenable number.

1325664 is an abundant number, since it is smaller than the sum of its proper divisors (2445012).

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

1325664 is a wasteful number, since it uses less digits than its factorization.

1325664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4619 (or 4608 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1325664 is about 1151.3748303659. The cubic root of 1325664 is about 109.8528058780.

The spelling of 1325664 in words is "one million, three hundred twenty-five thousand, six hundred sixty-four".