42212042 has 16 divisors (see below), whose sum is σ = 66620232. Its totient is φ = 20033280.

The previous prime is 42212039. The next prime is 42212047. The reversal of 42212042 is 24021224.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 36590401 + 5621641 = 6049^2 + 2371^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42212042.

It is not an unprimeable number, because it can be changed into a prime (42212047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3923 + ... + 9990.

Almost surely, 2^42212042 is an apocalyptic number.

42212042 is a deficient number, since it is larger than the sum of its proper divisors (24408190).

42212042 is a wasteful number, since it uses less digits than its factorization.

42212042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13993.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42212042 is about 6497.0794977436. The cubic root of 42212042 is about 348.1866539527.

Adding to 42212042 its reverse (24021224), we get a palindrome (66233266).

The spelling of 42212042 in words is "forty-two million, two hundred twelve thousand, forty-two".