1994128142 has 8 divisors (see below), whose sum is σ = 2991400632. Its totient is φ = 996994600.

The previous prime is 1994128099. The next prime is 1994128151. The reversal of 1994128142 is 2418214991.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1994128142.

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, 15917 + ... + 65127.

It is an arithmetic number, because the mean of its divisors is an integer number (373925079).

Almost surely, 2^1994128142 is an apocalyptic number.

1994128142 is a deficient number, since it is larger than the sum of its proper divisors (997272490).

1994128142 is a wasteful number, since it uses less digits than its factorization.

1994128142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69474.

The product of its digits is 41472, while the sum is 41.

The square root of 1994128142 is about 44655.6619254491. The cubic root of 1994128142 is about 1258.6868283273.

The spelling of 1994128142 in words is "one billion, nine hundred ninety-four million, one hundred twenty-eight thousand, one hundred forty-two".