42105422 has 4 divisors (see below), whose sum is σ = 63158136. Its totient is φ = 21052710.

The previous prime is 42105407. The next prime is 42105449. The reversal of 42105422 is 22450124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 42105394 and 42105403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10526354 + ... + 10526357.

It is an arithmetic number, because the mean of its divisors is an integer number (15789534).

Almost surely, 2^42105422 is an apocalyptic number.

42105422 is a deficient number, since it is larger than the sum of its proper divisors (21052714).

42105422 is a wasteful number, since it uses less digits than its factorization.

42105422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21052713.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42105422 is about 6488.8690848252. The cubic root of 42105422 is about 347.8932545726.

Adding to 42105422 its reverse (22450124), we get a palindrome (64555546).

The spelling of 42105422 in words is "forty-two million, one hundred five thousand, four hundred twenty-two".