155000042 has 16 divisors (see below), whose sum is σ = 234699552. Its totient is φ = 76770480.

The previous prime is 155000039. The next prime is 155000047. The reversal of 155000042 is 240000551.

It is not an unprimeable number, because it can be changed into a prime (155000047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119417 + ... + 120707.

It is an arithmetic number, because the mean of its divisors is an integer number (14668722).

Almost surely, 2^155000042 is an apocalyptic number.

155000042 is a deficient number, since it is larger than the sum of its proper divisors (79699510).

155000042 is a wasteful number, since it uses less digits than its factorization.

155000042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 155000042 is about 12449.9012847492. The cubic root of 155000042 is about 537.1685840129.

Adding to 155000042 its reverse (240000551), we get a palindrome (395000593).

The spelling of 155000042 in words is "one hundred fifty-five million, forty-two", and thus it is an aban number.