42535221 has 8 divisors (see below), whose sum is σ = 57160704. Its totient is φ = 28133280.

The previous prime is 42535187. The next prime is 42535223. The reversal of 42535221 is 12253524.

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

It is not a de Polignac number, because 42535221 - 2¹⁴ = 42518837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42535191 and 42535200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42535223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55440 + ... + 56201.

It is an arithmetic number, because the mean of its divisors is an integer number (7145088).

Almost surely, 2^42535221 is an apocalyptic number.

It is an amenable number.

42535221 is a deficient number, since it is larger than the sum of its proper divisors (14625483).

42535221 is a wasteful number, since it uses less digits than its factorization.

42535221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111771.

The product of its digits is 2400, while the sum is 24.

The square root of 42535221 is about 6521.9031731543. The cubic root of 42535221 is about 349.0729781187.

Adding to 42535221 its reverse (12253524), we get a palindrome (54788745).

The spelling of 42535221 in words is "forty-two million, five hundred thirty-five thousand, two hundred twenty-one".