1999158 has 16 divisors (see below), whose sum is σ = 4569600. Its totient is φ = 571176.

The previous prime is 1999121. The next prime is 1999163. The reversal of 1999158 is 8519991.

1999158 is nontrivially palindromic in base 13.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 47599 = 1999158 / (1 + 9 + 9 + 9 + 1 + 5 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23758 + ... + 23841.

It is an arithmetic number, because the mean of its divisors is an integer number (285600).

2^1999158 is an apocalyptic number.

1999158 is an abundant number, since it is smaller than the sum of its proper divisors (2570442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999158 is a wasteful number, since it uses less digits than its factorization.

1999158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47611.

The product of its digits is 29160, while the sum is 42.

The square root of 1999158 is about 1413.9158390795. The cubic root of 1999158 is about 125.9744216156.

The spelling of 1999158 in words is "one million, nine hundred ninety-nine thousand, one hundred fifty-eight".