42521938 has 8 divisors (see below), whose sum is σ = 63835632. Its totient is φ = 21243396.

The previous prime is 42521933. The next prime is 42521951. The reversal of 42521938 is 83912524.

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

It is a super-2 number, since 2×42521938² = 3616230422551688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42521933) 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 3 ways as a sum of consecutive naturals, for example, 5520 + ... + 10747.

It is an arithmetic number, because the mean of its divisors is an integer number (7979454).

Almost surely, 2^42521938 is an apocalyptic number.

42521938 is a deficient number, since it is larger than the sum of its proper divisors (21313694).

42521938 is a wasteful number, since it uses less digits than its factorization.

42521938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17576.

The product of its digits is 17280, while the sum is 34.

The square root of 42521938 is about 6520.8847559208. The cubic root of 42521938 is about 349.0366378889.

The spelling of 42521938 in words is "forty-two million, five hundred twenty-one thousand, nine hundred thirty-eight".