42212857 has 8 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 41249520.

The previous prime is 42212839. The next prime is 42212867. The reversal of 42212857 is 75821224.

It is a happy number.

42212857 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 42212857 - 2²³ = 33824249 is a prime.

It is a super-2 number, since 2×42212857² = 3563850592204898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42212827) 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, 12894 + ... + 15832.

It is an arithmetic number, because the mean of its divisors is an integer number (5397840).

Almost surely, 2^42212857 is an apocalyptic number.

It is an amenable number.

42212857 is a deficient number, since it is larger than the sum of its proper divisors (969863).

42212857 is a wasteful number, since it uses less digits than its factorization.

42212857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263.

The product of its digits is 8960, while the sum is 31.

The square root of 42212857 is about 6497.1422179294. The cubic root of 42212857 is about 348.1888947848.

The spelling of 42212857 in words is "forty-two million, two hundred twelve thousand, eight hundred fifty-seven".