42142422 has 32 divisors (see below), whose sum is σ = 101993472. Its totient is φ = 11332224.

The previous prime is 42142421. The next prime is 42142427. The reversal of 42142422 is 22424124.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42142421) 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 15 ways as a sum of consecutive naturals, for example, 28798 + ... + 30225.

It is an arithmetic number, because the mean of its divisors is an integer number (3187296).

Almost surely, 2^42142422 is an apocalyptic number.

42142422 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

42142422 is an abundant number, since it is smaller than the sum of its proper divisors (59851050).

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

42142422 is a wasteful number, since it uses less digits than its factorization.

42142422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59052.

The product of its digits is 1024, while the sum is 21.

The square root of 42142422 is about 6491.7194948642. The cubic root of 42142422 is about 347.9951280861.

Adding to 42142422 its reverse (22424124), we get a palindrome (64566546).

The spelling of 42142422 in words is "forty-two million, one hundred forty-two thousand, four hundred twenty-two".