1986159 has 16 divisors (see below), whose sum is σ = 3046400. Its totient is φ = 1127520.

The previous prime is 1986137. The next prime is 1986167. The reversal of 1986159 is 9516891.

It is not a de Polignac number, because 1986159 - 2⁸ = 1985903 is a prime.

1986159 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5517 + ... + 5865.

It is an arithmetic number, because the mean of its divisors is an integer number (190400).

2^1986159 is an apocalyptic number.

1986159 is a deficient number, since it is larger than the sum of its proper divisors (1060241).

1986159 is a wasteful number, since it uses less digits than its factorization.

1986159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630.

The product of its digits is 19440, while the sum is 39.

The square root of 1986159 is about 1409.3115340477. The cubic root of 1986159 is about 125.7007891478.

It can be divided in two parts, 1986 and 159, that added together give a triangular number (2145 = T₆₅).

The spelling of 1986159 in words is "one million, nine hundred eighty-six thousand, one hundred fifty-nine".