42438215 has 8 divisors (see below), whose sum is σ = 51211440. Its totient is φ = 33760192.

The previous prime is 42438203. The next prime is 42438217. The reversal of 42438215 is 51283424.

It is a happy number.

42438215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42438215 - 2¹⁴ = 42421831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42438217) by changing a digit.

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, 22814 + ... + 24603.

It is an arithmetic number, because the mean of its divisors is an integer number (6401430).

Almost surely, 2^42438215 is an apocalyptic number.

42438215 is a deficient number, since it is larger than the sum of its proper divisors (8773225).

42438215 is a wasteful number, since it uses less digits than its factorization.

42438215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47601.

The product of its digits is 7680, while the sum is 29.

The square root of 42438215 is about 6514.4619885298. The cubic root of 42438215 is about 348.8074103746.

The spelling of 42438215 in words is "forty-two million, four hundred thirty-eight thousand, two hundred fifteen".