42855281 has 8 divisors (see below), whose sum is σ = 49042560. Its totient is φ = 36684288.

The previous prime is 42855269. The next prime is 42855311. The reversal of 42855281 is 18255824.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42855281 is a prime.

It is a super-2 number, since 2×42855281² = 3673150219177922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42855221) 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, 2225 + ... + 9521.

It is an arithmetic number, because the mean of its divisors is an integer number (6130320).

Almost surely, 2^42855281 is an apocalyptic number.

It is an amenable number.

42855281 is a deficient number, since it is larger than the sum of its proper divisors (6187279).

42855281 is an equidigital number, since it uses as much as digits as its factorization.

42855281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8143.

The product of its digits is 25600, while the sum is 35.

The square root of 42855281 is about 6546.3945038471. The cubic root of 42855281 is about 349.9463346291.

The spelling of 42855281 in words is "forty-two million, eight hundred fifty-five thousand, two hundred eighty-one".