1375559 has 4 divisors (see below), whose sum is σ = 1392216. Its totient is φ = 1358904.

The previous prime is 1375547. The next prime is 1375567. The reversal of 1375559 is 9555731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1375559 - 2⁸ = 1375303 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 (1375159) 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 3 ways as a sum of consecutive naturals, for example, 8204 + ... + 8369.

It is an arithmetic number, because the mean of its divisors is an integer number (348054).

2^1375559 is an apocalyptic number.

1375559 is a deficient number, since it is larger than the sum of its proper divisors (16657).

1375559 is an equidigital number, since it uses as much as digits as its factorization.

1375559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16656.

The product of its digits is 23625, while the sum is 35.

The square root of 1375559 is about 1172.8422741358. The cubic root of 1375559 is about 111.2140716368.

The spelling of 1375559 in words is "one million, three hundred seventy-five thousand, five hundred fifty-nine".