42402242 has 4 divisors (see below), whose sum is σ = 63603366. Its totient is φ = 21201120.

The previous prime is 42402229. The next prime is 42402247. The reversal of 42402242 is 24220424.

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., 41744521 + 657721 = 6461^2 + 811^2 .

It is not an unprimeable number, because it can be changed into a prime (42402247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600559 + ... + 10600562.

Almost surely, 2^42402242 is an apocalyptic number.

42402242 is a deficient number, since it is larger than the sum of its proper divisors (21201124).

42402242 is a wasteful number, since it uses less digits than its factorization.

42402242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21201123.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 42402242 is about 6511.7003923706. The cubic root of 42402242 is about 348.7088263036.

Adding to 42402242 its reverse (24220424), we get a palindrome (66622666).

The spelling of 42402242 in words is "forty-two million, four hundred two thousand, two hundred forty-two".