42195939 has 16 divisors (see below), whose sum is σ = 57312000. Its totient is φ = 27609120.

The previous prime is 42195919. The next prime is 42195977. The reversal of 42195939 is 93959124.

It is not a de Polignac number, because 42195939 - 2¹⁵ = 42163171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42195939.

It is not an unprimeable number, because it can be changed into a prime (42195919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84312 + ... + 84810.

It is an arithmetic number, because the mean of its divisors is an integer number (3582000).

Almost surely, 2^42195939 is an apocalyptic number.

42195939 is a deficient number, since it is larger than the sum of its proper divisors (15116061).

42195939 is a wasteful number, since it uses less digits than its factorization.

42195939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970.

The product of its digits is 87480, while the sum is 42.

The square root of 42195939 is about 6495.8401304219. The cubic root of 42195939 is about 348.1423730434.

It can be divided in two parts, 42195 and 939, that added together give a palindrome (43134).

The spelling of 42195939 in words is "forty-two million, one hundred ninety-five thousand, nine hundred thirty-nine".