42615730 has 16 divisors (see below), whose sum is σ = 77414040. Its totient is φ = 16889472.

The previous prime is 42615701. The next prime is 42615733. The reversal of 42615730 is 3751624.

It can be written as a sum of positive squares in 4 ways, for example, as 35892081 + 6723649 = 5991^2 + 2593^2 .

It is a super-3 number, since 3×42615730³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (42615733) 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, 18459 + ... + 20638.

Almost surely, 2^42615730 is an apocalyptic number.

42615730 is a deficient number, since it is larger than the sum of its proper divisors (34798310).

42615730 is a wasteful number, since it uses less digits than its factorization.

42615730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39213.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 42615730 is about 6528.0724567057. The cubic root of 42615730 is about 349.2930765318.

The spelling of 42615730 in words is "forty-two million, six hundred fifteen thousand, seven hundred thirty".