1375565 has 8 divisors (see below), whose sum is σ = 1667328. Its totient is φ = 1089360.

The previous prime is 1375547. The next prime is 1375567. The reversal of 1375565 is 5655731.

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

It is not a de Polignac number, because 1375565 - 2¹⁴ = 1359181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821 + ... + 1850.

It is an arithmetic number, because the mean of its divisors is an integer number (208416).

2^1375565 is an apocalyptic number.

It is an amenable number.

1375565 is a deficient number, since it is larger than the sum of its proper divisors (291763).

1375565 is a wasteful number, since it uses less digits than its factorization.

1375565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779.

The product of its digits is 15750, while the sum is 32.

The square root of 1375565 is about 1172.8448320217. The cubic root of 1375565 is about 111.2142333367.

The spelling of 1375565 in words is "one million, three hundred seventy-five thousand, five hundred sixty-five".