155442142 has 8 divisors (see below), whose sum is σ = 243300816. Its totient is φ = 74341872.

The previous prime is 155442139. The next prime is 155442187. The reversal of 155442142 is 241244551.

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 155442142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689543 + ... + 1689634.

It is an arithmetic number, because the mean of its divisors is an integer number (30412602).

Almost surely, 2^155442142 is an apocalyptic number.

155442142 is a deficient number, since it is larger than the sum of its proper divisors (87858674).

155442142 is a wasteful number, since it uses less digits than its factorization.

155442142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3379202.

The product of its digits is 6400, while the sum is 28.

The square root of 155442142 is about 12467.6438030608. The cubic root of 155442142 is about 537.6788135549.

Adding to 155442142 its reverse (241244551), we get a palindrome (396686693).

The spelling of 155442142 in words is "one hundred fifty-five million, four hundred forty-two thousand, one hundred forty-two".