42016424 has 16 divisors (see below), whose sum is σ = 79122420. Its totient is φ = 20917120.

The previous prime is 42016421. The next prime is 42016433. The reversal of 42016424 is 42461024.

It can be written as a sum of positive squares in 2 ways, for example, as 42016324 + 100 = 6482^2 + 10^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42016424.

It is not an unprimeable number, because it can be changed into a prime (42016421) 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, 9407 + ... + 13134.

Almost surely, 2^42016424 is an apocalyptic number.

It is an amenable number.

42016424 is a deficient number, since it is larger than the sum of its proper divisors (37105996).

42016424 is a wasteful number, since it uses less digits than its factorization.

42016424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22780 (or 22776 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 42016424 is about 6482.0077136640. The cubic root of 42016424 is about 347.6479683153.

Adding to 42016424 its reverse (42461024), we get a palindrome (84477448).

The spelling of 42016424 in words is "forty-two million, sixteen thousand, four hundred twenty-four".