1859 has 6 divisors (see below), whose sum is σ = 2196. Its totient is φ = 1560.

The previous prime is 1847. The next prime is 1861. The reversal of 1859 is 9581.

1859 = T₁₀ + T₁₁ + ... + T₂₂.

It is a de Polignac number, because none of the positive numbers 2^k-1859 is a prime.

It is a Duffinian number.

Its product of digits (360) is a multiple of the sum of its prime divisors (24).

It is a plaindrome in base 6.

It is a nialpdrome in base 13 and base 16.

It is not an unprimeable number, because it can be changed into a prime (1879) 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, 137 + ... + 149.

It is an arithmetic number, because the mean of its divisors is an integer number (366).

1859 is a deficient number, since it is larger than the sum of its proper divisors (337).

1859 is a wasteful number, since it uses less digits than its factorization.

1859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37 (or 24 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 1859 is about 43.1161222746. The cubic root of 1859 is about 12.2958851109.

It can be divided in two parts, 18 and 59, that added together give a palindrome (77).

The spelling of 1859 in words is "one thousand, eight hundred fifty-nine".