1995042042 has 128 divisors (see below), whose sum is σ = 5242406400. Its totient is φ = 550540800.

The previous prime is 1995042029. The next prime is 1995042053. The reversal of 1995042042 is 2402405991.

1995042042 is a `hidden beast` number, since 1 + 99 + 504 + 20 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1995041988 and 1995042006.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1688692 + ... + 1689872.

It is an arithmetic number, because the mean of its divisors is an integer number (40956300).

Almost surely, 2^1995042042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1995042042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2621203200).

1995042042 is an abundant number, since it is smaller than the sum of its proper divisors (3247364358).

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

1995042042 is a wasteful number, since it uses less digits than its factorization.

1995042042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1995042042 is about 44665.8934982835. The cubic root of 1995042042 is about 1258.8790824734.

The spelling of 1995042042 in words is "one billion, nine hundred ninety-five million, forty-two thousand, forty-two".