42239205 has 32 divisors (see below), whose sum is σ = 77521920. Its totient is φ = 21798720.

The previous prime is 42239191. The next prime is 42239207. The reversal of 42239205 is 50293224.

42239205 is a `hidden beast` number, since 422 + 39 + 205 = 666.

It is not a de Polignac number, because 42239205 - 2¹¹ = 42237157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42239207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 862 + ... + 9231.

It is an arithmetic number, because the mean of its divisors is an integer number (2422560).

Almost surely, 2^42239205 is an apocalyptic number.

42239205 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42239205 is a deficient number, since it is larger than the sum of its proper divisors (35282715).

42239205 is a wasteful number, since it uses less digits than its factorization.

42239205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10138 (or 10132 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 42239205 is about 6499.1695623364. The cubic root of 42239205 is about 348.2613227414.

The spelling of 42239205 in words is "forty-two million, two hundred thirty-nine thousand, two hundred five".