52542020 has 24 divisors (see below), whose sum is σ = 110506200. Its totient is φ = 20984832.

The previous prime is 52542013. The next prime is 52542023. The reversal of 52542020 is 2024525.

It can be written as a sum of positive squares in 4 ways, for example, as 13778944 + 38763076 = 3712^2 + 6226^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 52541983 and 52542001.

It is not an unprimeable number, because it can be changed into a prime (52542023) 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, 14996 + ... + 18164.

It is an arithmetic number, because the mean of its divisors is an integer number (4604425).

Almost surely, 2^52542020 is an apocalyptic number.

It is an amenable number.

52542020 is an abundant number, since it is smaller than the sum of its proper divisors (57964180).

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

52542020 is a wasteful number, since it uses less digits than its factorization.

52542020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007 (or 4005 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 52542020 is about 7248.5874485999. The cubic root of 52542020 is about 374.5434919005.

Adding to 52542020 its reverse (2024525), we get a palindrome (54566545).

The spelling of 52542020 in words is "fifty-two million, five hundred forty-two thousand, twenty".