159940042 has 8 divisors (see below), whose sum is σ = 240007716. Its totient is φ = 79937472.

The previous prime is 159940021. The next prime is 159940049. The reversal of 159940042 is 240049951.

159940042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 159794881 + 145161 = 12641^2 + 381^2 .

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

It is not an unprimeable number, because it can be changed into a prime (159940049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9583 + ... + 20290.

Almost surely, 2^159940042 is an apocalyptic number.

159940042 is a deficient number, since it is larger than the sum of its proper divisors (80067674).

159940042 is a wasteful number, since it uses less digits than its factorization.

159940042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32552.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 159940042 is about 12646.7403705461. The cubic root of 159940042 is about 542.8157019084.

Adding to 159940042 its reverse (240049951), we get a palindrome (399989993).

The spelling of 159940042 in words is "one hundred fifty-nine million, nine hundred forty thousand, forty-two".