42221420 has 24 divisors (see below), whose sum is σ = 93332400. Its totient is φ = 15999552.

The previous prime is 42221407. The next prime is 42221437. The reversal of 42221420 is 2412224.

It is a happy number.

42221420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55175 + ... + 55934.

It is an arithmetic number, because the mean of its divisors is an integer number (3888850).

Almost surely, 2^42221420 is an apocalyptic number.

It is an amenable number.

42221420 is an abundant number, since it is smaller than the sum of its proper divisors (51110980).

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

42221420 is a wasteful number, since it uses less digits than its factorization.

42221420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111137 (or 111135 counting only the distinct ones).

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

The square root of 42221420 is about 6497.8011665486. The cubic root of 42221420 is about 348.2124369007.

Adding to 42221420 its reverse (2412224), we get a palindrome (44633644).

The spelling of 42221420 in words is "forty-two million, two hundred twenty-one thousand, four hundred twenty".