42856229 has 32 divisors (see below), whose sum is σ = 52147200. Its totient is φ = 34836480.

The previous prime is 42856223. The next prime is 42856301. The reversal of 42856229 is 92265824.

It is a cyclic number.

It is not a de Polignac number, because 42856229 - 2⁴ = 42856213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42856192 and 42856201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42856223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221957 + ... + 222149.

It is an arithmetic number, because the mean of its divisors is an integer number (1629600).

Almost surely, 2^42856229 is an apocalyptic number.

It is an amenable number.

42856229 is a deficient number, since it is larger than the sum of its proper divisors (9290971).

42856229 is a wasteful number, since it uses less digits than its factorization.

42856229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285.

The product of its digits is 69120, while the sum is 38.

The square root of 42856229 is about 6546.4669097155. The cubic root of 42856229 is about 349.9489149931.

The spelling of 42856229 in words is "forty-two million, eight hundred fifty-six thousand, two hundred twenty-nine".