253641242 has 4 divisors (see below), whose sum is σ = 380461866. Its totient is φ = 126820620.

The previous prime is 253641239. The next prime is 253641257. The reversal of 253641242 is 242146352.

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., 252778201 + 863041 = 15899^2 + 929^2 .

It is an unprimeable number.

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, 63410309 + ... + 63410312.

Almost surely, 2^253641242 is an apocalyptic number.

253641242 is a deficient number, since it is larger than the sum of its proper divisors (126820624).

253641242 is a wasteful number, since it uses less digits than its factorization.

253641242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126820623.

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

The square root of 253641242 is about 15926.1182338949. The cubic root of 253641242 is about 633.0042468230.

Adding to 253641242 its reverse (242146352), we get a palindrome (495787594).

The spelling of 253641242 in words is "two hundred fifty-three million, six hundred forty-one thousand, two hundred forty-two".