1999142 has 8 divisors (see below), whose sum is σ = 3156600. Its totient is φ = 946944.

The previous prime is 1999121. The next prime is 1999163. The reversal of 1999142 is 2419991.

It is an interprime number because it is at equal distance from previous prime (1999121) and next prime (1999163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26267 + ... + 26342.

It is an arithmetic number, because the mean of its divisors is an integer number (394575).

2^1999142 is an apocalyptic number.

1999142 is a deficient number, since it is larger than the sum of its proper divisors (1157458).

1999142 is a wasteful number, since it uses less digits than its factorization.

1999142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52630.

The product of its digits is 5832, while the sum is 35.

The square root of 1999142 is about 1413.9101810228. The cubic root of 1999142 is about 125.9740855414.

The spelling of 1999142 in words is "one million, nine hundred ninety-nine thousand, one hundred forty-two".