42234021 has 16 divisors (see below), whose sum is σ = 63597120. Its totient is φ = 27693360.

The previous prime is 42234011. The next prime is 42234037. The reversal of 42234021 is 12043224.

It is not a de Polignac number, because 42234021 - 2¹³ = 42225829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42233985 and 42234003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42234011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11175 + ... + 14468.

It is an arithmetic number, because the mean of its divisors is an integer number (3974820).

Almost surely, 2^42234021 is an apocalyptic number.

It is an amenable number.

42234021 is a deficient number, since it is larger than the sum of its proper divisors (21363099).

42234021 is a wasteful number, since it uses less digits than its factorization.

42234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25713 (or 25707 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42234021 is about 6498.7707299150. The cubic root of 42234021 is about 348.2470748363.

Adding to 42234021 its reverse (12043224), we get a palindrome (54277245).

It can be divided in two parts, 422 and 34021, that added together give a palindrome (34443).

The spelling of 42234021 in words is "forty-two million, two hundred thirty-four thousand, twenty-one".