252660242 has 4 divisors (see below), whose sum is σ = 378990366. Its totient is φ = 126330120.

The previous prime is 252660241. The next prime is 252660301. The reversal of 252660242 is 242066252.

It is a happy number.

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., 183087961 + 69572281 = 13531^2 + 8341^2 .

It is not an unprimeable number, because it can be changed into a prime (252660241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63165059 + ... + 63165062.

Almost surely, 2^252660242 is an apocalyptic number.

252660242 is a deficient number, since it is larger than the sum of its proper divisors (126330124).

252660242 is a wasteful number, since it uses less digits than its factorization.

252660242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126330123.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 252660242 is about 15895.2899312973. The cubic root of 252660242 is about 632.1871091162.

The spelling of 252660242 in words is "two hundred fifty-two million, six hundred sixty thousand, two hundred forty-two".