1375859 has 4 divisors (see below), whose sum is σ = 1381104. Its totient is φ = 1370616.

The previous prime is 1375853. The next prime is 1375877. The reversal of 1375859 is 9585731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9585731 = 193 ⋅49667.

It is a cyclic number.

It is not a de Polignac number, because 1375859 - 2¹² = 1371763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1375853) 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, 2207 + ... + 2760.

It is an arithmetic number, because the mean of its divisors is an integer number (345276).

2^1375859 is an apocalyptic number.

1375859 is a deficient number, since it is larger than the sum of its proper divisors (5245).

1375859 is an equidigital number, since it uses as much as digits as its factorization.

1375859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5244.

The product of its digits is 37800, while the sum is 38.

The square root of 1375859 is about 1172.9701615983. The cubic root of 1375859 is about 111.2221560583. Note that the first 3 decimals are identical.

The spelling of 1375859 in words is "one million, three hundred seventy-five thousand, eight hundred fifty-nine".