252425240642 has 4 divisors (see below), whose sum is σ = 378637860966. Its totient is φ = 126212620320.

The previous prime is 252425240581. The next prime is 252425240681. The reversal of 252425240642 is 246042524252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 143200939561 + 109224301081 = 378419^2 + 330491^2 .

It is a super-2 number, since 2×252425240642² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 252425240596 and 252425240605.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 63106310159 + ... + 63106310162.

Almost surely, 2^252425240642 is an apocalyptic number.

252425240642 is a deficient number, since it is larger than the sum of its proper divisors (126212620324).

252425240642 is a wasteful number, since it uses less digits than its factorization.

252425240642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126212620323.

The product of its (nonzero) digits is 307200, while the sum is 38.

Adding to 252425240642 its reverse (246042524252), we get a palindrome (498467764894).

The spelling of 252425240642 in words is "two hundred fifty-two billion, four hundred twenty-five million, two hundred forty thousand, six hundred forty-two".