42605331 has 8 divisors (see below), whose sum is σ = 57077184. Its totient is φ = 28268520.

The previous prime is 42605323. The next prime is 42605351. The reversal of 42605331 is 13350624.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42605331 - 2³ = 42605323 is a prime.

It is a super-2 number, since 2×42605331² = 3630428459239122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42605351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33021 + ... + 34286.

It is an arithmetic number, because the mean of its divisors is an integer number (7134648).

Almost surely, 2^42605331 is an apocalyptic number.

42605331 is a deficient number, since it is larger than the sum of its proper divisors (14471853).

42605331 is a wasteful number, since it uses less digits than its factorization.

42605331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67521.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 42605331 is about 6527.2759249169. The cubic root of 42605331 is about 349.2646629688.

Adding to 42605331 its reverse (13350624), we get a palindrome (55955955).

It can be divided in two parts, 4260 and 5331, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 42605331 in words is "forty-two million, six hundred five thousand, three hundred thirty-one".