42835221 has 48 divisors (see below), whose sum is σ = 73749312. Its totient is φ = 23616000.

The previous prime is 42835217. The next prime is 42835229. The reversal of 42835221 is 12253824.

42835221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42835221 - 2² = 42835217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42835229) 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 47 ways as a sum of consecutive naturals, for example, 106621 + ... + 107021.

It is an arithmetic number, because the mean of its divisors is an integer number (1536444).

Almost surely, 2^42835221 is an apocalyptic number.

It is an amenable number.

42835221 is a deficient number, since it is larger than the sum of its proper divisors (30914091).

42835221 is a wasteful number, since it uses less digits than its factorization.

42835221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 511 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 42835221 is about 6544.8621834230. The cubic root of 42835221 is about 349.8917243305.

The spelling of 42835221 in words is "forty-two million, eight hundred thirty-five thousand, two hundred twenty-one".