42145422 has 16 divisors (see below), whose sum is σ = 91953792. Its totient is φ = 12771320.

The previous prime is 42145421. The next prime is 42145423. The reversal of 42145422 is 22454124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42145421) and next prime (42145423).

It is a junction number, because it is equal to n+sod(n) for n = 42145392 and 42145401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42145421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319218 + ... + 319349.

It is an arithmetic number, because the mean of its divisors is an integer number (5747112).

Almost surely, 2^42145422 is an apocalyptic number.

42145422 is an abundant number, since it is smaller than the sum of its proper divisors (49808370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42145422 is a wasteful number, since it uses less digits than its factorization.

42145422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638583.

The product of its digits is 2560, while the sum is 24.

The square root of 42145422 is about 6491.9505543404. The cubic root of 42145422 is about 348.0033854869.

Adding to 42145422 its reverse (22454124), we get a palindrome (64599546).

The spelling of 42145422 in words is "forty-two million, one hundred forty-five thousand, four hundred twenty-two".