1375664 has 20 divisors (see below), whose sum is σ = 2690304. Its totient is φ = 681408.

The previous prime is 1375639. The next prime is 1375669. The reversal of 1375664 is 4665731.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 1 + 3³ + 7³ + 5³ + 6⁶ + 6⁷ + 4¹⁰ .

It is a self number, because there is not a number n which added to its sum of digits gives 1375664.

It is not an unprimeable number, because it can be changed into a prime (1375669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1694 + ... + 2370.

2^1375664 is an apocalyptic number.

It is an amenable number.

1375664 is a deficient number, since it is larger than the sum of its proper divisors (1314640).

1375664 is a wasteful number, since it uses less digits than its factorization.

1375664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 806 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 1375664 is about 1172.8870363338. The cubic root of 1375664 is about 111.2169013180.

The spelling of 1375664 in words is "one million, three hundred seventy-five thousand, six hundred sixty-four".