42240243242 has 4 divisors (see below), whose sum is σ = 63360364866. Its totient is φ = 21120121620.

The previous prime is 42240243209. The next prime is 42240243257. The reversal of 42240243242 is 24234204224.

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., 40710729361 + 1529513881 = 201769^2 + 39109^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560060809 + ... + 10560060812.

Almost surely, 2^42240243242 is an apocalyptic number.

42240243242 is a deficient number, since it is larger than the sum of its proper divisors (21120121624).

42240243242 is a wasteful number, since it uses less digits than its factorization.

42240243242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120121623.

The product of its (nonzero) digits is 24576, while the sum is 29.

Adding to 42240243242 its reverse (24234204224), we get a palindrome (66474447466).

The spelling of 42240243242 in words is "forty-two billion, two hundred forty million, two hundred forty-three thousand, two hundred forty-two".