42421042 has 4 divisors (see below), whose sum is σ = 63631566. Its totient is φ = 21210520.

The previous prime is 42421037. The next prime is 42421063. The reversal of 42421042 is 24012424.

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., 42237001 + 184041 = 6499^2 + 429^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605259 + ... + 10605262.

Almost surely, 2^42421042 is an apocalyptic number.

42421042 is a deficient number, since it is larger than the sum of its proper divisors (21210524).

42421042 is a wasteful number, since it uses less digits than its factorization.

42421042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21210523.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 42421042 is about 6513.1437877572. The cubic root of 42421042 is about 348.7603546897.

Adding to 42421042 its reverse (24012424), we get a palindrome (66433466).

The spelling of 42421042 in words is "forty-two million, four hundred twenty-one thousand, forty-two".