52140042 has 24 divisors (see below), whose sum is σ = 114070944. Its totient is φ = 17210664.

The previous prime is 52139963. The next prime is 52140043. The reversal of 52140042 is 24004125.

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 = 52139997 and 52140024.

It is not an unprimeable number, because it can be changed into a prime (52140043) 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 11 ways as a sum of consecutive naturals, for example, 12208 + ... + 15915.

It is an arithmetic number, because the mean of its divisors is an integer number (4752956).

Almost surely, 2^52140042 is an apocalyptic number.

52140042 is an abundant number, since it is smaller than the sum of its proper divisors (61930902).

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

52140042 is a wasteful number, since it uses less digits than its factorization.

52140042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28234 (or 28231 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 52140042 is about 7220.8061876774. The cubic root of 52140042 is about 373.5858847781.

Adding to 52140042 its reverse (24004125), we get a palindrome (76144167).

The spelling of 52140042 in words is "fifty-two million, one hundred forty thousand, forty-two".