52500042 has 32 divisors (see below), whose sum is σ = 133334400. Its totient is φ = 14999904.

The previous prime is 52500023. The next prime is 52500047. The reversal of 52500042 is 24000525.

It is a super-3 number, since 3×52500042³ (a number of 24 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 52499988 and 52500024.

It is not an unprimeable number, because it can be changed into a prime (52500047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69067 + ... + 69822.

It is an arithmetic number, because the mean of its divisors is an integer number (4166700).

Almost surely, 2^52500042 is an apocalyptic number.

52500042 is an abundant number, since it is smaller than the sum of its proper divisors (80834358).

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

52500042 is a wasteful number, since it uses less digits than its factorization.

52500042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138907 (or 138901 counting only the distinct ones).

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

The square root of 52500042 is about 7245.6912713695. The cubic root of 52500042 is about 374.4437192125.

Adding to 52500042 its reverse (24000525), we get a palindrome (76500567).

The spelling of 52500042 in words is "fifty-two million, five hundred thousand, forty-two".