42165320 has 16 divisors (see below), whose sum is σ = 94872060. Its totient is φ = 16866112.

The previous prime is 42165307. The next prime is 42165323. The reversal of 42165320 is 2356124.

It can be written as a sum of positive squares in 2 ways, for example, as 42016324 + 148996 = 6482^2 + 386^2 .

It is not an unprimeable number, because it can be changed into a prime (42165323) 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, 527027 + ... + 527106.

Almost surely, 2^42165320 is an apocalyptic number.

42165320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42165320 is an abundant number, since it is smaller than the sum of its proper divisors (52706740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42165320 is a wasteful number, since it uses less digits than its factorization.

42165320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054144 (or 1054140 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 42165320 is about 6493.4828867103. The cubic root of 42165320 is about 348.0581441579.

The spelling of 42165320 in words is "forty-two million, one hundred sixty-five thousand, three hundred twenty".