42520050 has 72 divisors (see below), whose sum is σ = 116184900. Its totient is φ = 11145600.

The previous prime is 42520039. The next prime is 42520057. The reversal of 42520050 is 5002524.

42520050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 2792241 + 39727809 = 1671^2 + 6303^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42520057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26676 + ... + 28224.

Almost surely, 2^42520050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42520050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58092450).

42520050 is an abundant number, since it is smaller than the sum of its proper divisors (73664850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42520050 is a wasteful number, since it uses less digits than its factorization.

42520050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628 (or 1620 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 42520050 is about 6520.7399886823. The cubic root of 42520050 is about 349.0314719992.

Adding to 42520050 its reverse (5002524), we get a palindrome (47522574).

The spelling of 42520050 in words is "forty-two million, five hundred twenty thousand, fifty".