42402240442 has 4 divisors (see below), whose sum is σ = 63603360666. Its totient is φ = 21201120220.

The previous prime is 42402240437. The next prime is 42402240449. The reversal of 42402240442 is 24404220424.

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., 37931847121 + 4470393321 = 194761^2 + 66861^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42402240442.

It is not an unprimeable number, because it can be changed into a prime (42402240449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600560109 + ... + 10600560112.

Almost surely, 2^42402240442 is an apocalyptic number.

42402240442 is a deficient number, since it is larger than the sum of its proper divisors (21201120224).

42402240442 is a wasteful number, since it uses less digits than its factorization.

42402240442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21201120223.

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 42402240442 its reverse (24404220424), we get a palindrome (66806460866).

It can be divided in two parts, 424022 and 40442, that added together give a palindrome (464464).

The spelling of 42402240442 in words is "forty-two billion, four hundred two million, two hundred forty thousand, four hundred forty-two".