252440142 has 16 divisors (see below), whose sum is σ = 505102080. Its totient is φ = 84109752.

The previous prime is 252440141. The next prime is 252440179. The reversal of 252440142 is 241044252.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252440141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8043 + ... + 23865.

It is an arithmetic number, because the mean of its divisors is an integer number (31568880).

Almost surely, 2^252440142 is an apocalyptic number.

252440142 is an abundant number, since it is smaller than the sum of its proper divisors (252661938).

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

252440142 is a wasteful number, since it uses less digits than its factorization.

252440142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18487.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 252440142 is about 15888.3649882548. The cubic root of 252440142 is about 632.0034833302.

Adding to 252440142 its reverse (241044252), we get a palindrome (493484394).

The spelling of 252440142 in words is "two hundred fifty-two million, four hundred forty thousand, one hundred forty-two".