42520024 has 24 divisors (see below), whose sum is σ = 84147660. Its totient is φ = 20139696.

The previous prime is 42520021. The next prime is 42520039. The reversal of 42520024 is 42002524.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 42519983 and 42520010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4474 + ... + 10249.

Almost surely, 2^42520024 is an apocalyptic number.

It is an amenable number.

42520024 is a deficient number, since it is larger than the sum of its proper divisors (41627636).

42520024 is a wasteful number, since it uses less digits than its factorization.

42520024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14767 (or 14744 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42520024 is about 6520.7379950432. The cubic root of 42520024 is about 349.0314008577.

Adding to 42520024 its reverse (42002524), we get a palindrome (84522548).

It can be divided in two parts, 425 and 20024, that added together give a square (20449 = 143²).

The spelling of 42520024 in words is "forty-two million, five hundred twenty thousand, twenty-four".