42328081 has 4 divisors (see below), whose sum is σ = 43787700. Its totient is φ = 40868464.

The previous prime is 42328057. The next prime is 42328109. The reversal of 42328081 is 18082324.

42328081 is nontrivially palindromic in base 14.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7929856 + 34398225 = 2816^2 + 5865^2 .

It is a cyclic number.

It is not a de Polignac number, because 42328081 - 2⁵ = 42328049 is a prime.

It is a super-2 number, since 2×42328081² = 3583332882285122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42328001) 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, 729766 + ... + 729823.

It is an arithmetic number, because the mean of its divisors is an integer number (10946925).

Almost surely, 2^42328081 is an apocalyptic number.

It is an amenable number.

42328081 is a deficient number, since it is larger than the sum of its proper divisors (1459619).

42328081 is a wasteful number, since it uses less digits than its factorization.

42328081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459618.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 42328081 is about 6506.0034583452. The cubic root of 42328081 is about 348.5054118508.

The spelling of 42328081 in words is "forty-two million, three hundred twenty-eight thousand, eighty-one".