42858221 has 8 divisors (see below), whose sum is σ = 49100544. Its totient is φ = 36645840.

The previous prime is 42858203. The next prime is 42858289. The reversal of 42858221 is 12285824.

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

It is not a de Polignac number, because 42858221 - 2⁶ = 42858157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42858421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4325 + ... + 10218.

It is an arithmetic number, because the mean of its divisors is an integer number (6137568).

Almost surely, 2^42858221 is an apocalyptic number.

It is an amenable number.

42858221 is a deficient number, since it is larger than the sum of its proper divisors (6242323).

42858221 is a wasteful number, since it uses less digits than its factorization.

42858221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14971.

The product of its digits is 10240, while the sum is 32.

The square root of 42858221 is about 6546.6190510828. The cubic root of 42858221 is about 349.9543368999.

The spelling of 42858221 in words is "forty-two million, eight hundred fifty-eight thousand, two hundred twenty-one".