42155959 has 4 divisors (see below), whose sum is σ = 42189616. Its totient is φ = 42122304.

The previous prime is 42155957. The next prime is 42155983. The reversal of 42155959 is 95955124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42155959 - 2¹ = 42155957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42155951) 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, 14874 + ... + 17479.

It is an arithmetic number, because the mean of its divisors is an integer number (10547404).

Almost surely, 2^42155959 is an apocalyptic number.

42155959 is a deficient number, since it is larger than the sum of its proper divisors (33657).

42155959 is a wasteful number, since it uses less digits than its factorization.

42155959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33656.

The product of its digits is 81000, while the sum is 40.

The square root of 42155959 is about 6492.7620470798. The cubic root of 42155959 is about 348.0323851263.

The spelling of 42155959 in words is "forty-two million, one hundred fifty-five thousand, nine hundred fifty-nine".