42215430 has 16 divisors (see below), whose sum is σ = 101317104. Its totient is φ = 11257440.

The previous prime is 42215423. The next prime is 42215431. The reversal of 42215430 is 3451224.

It is a junction number, because it is equal to n+sod(n) for n = 42215397 and 42215406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42215431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703561 + ... + 703620.

It is an arithmetic number, because the mean of its divisors is an integer number (6332319).

Almost surely, 2^42215430 is an apocalyptic number.

42215430 is an abundant number, since it is smaller than the sum of its proper divisors (59101674).

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

42215430 is a wasteful number, since it uses less digits than its factorization.

42215430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407191.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42215430 is about 6497.3402250459. The cubic root of 42215430 is about 348.1959690262.

Adding to 42215430 its reverse (3451224), we get a palindrome (45666654).

The spelling of 42215430 in words is "forty-two million, two hundred fifteen thousand, four hundred thirty".