42854881 has 4 divisors (see below), whose sum is σ = 43900164. Its totient is φ = 41809600.

The previous prime is 42854873. The next prime is 42854887. The reversal of 42854881 is 18845824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12780625 + 30074256 = 3575^2 + 5484^2 .

It is a cyclic number.

It is not a de Polignac number, because 42854881 - 2³ = 42854873 is a prime.

It is a super-2 number, since 2×42854881² = 3673081651048322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42854887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522580 + ... + 522661.

It is an arithmetic number, because the mean of its divisors is an integer number (10975041).

Almost surely, 2^42854881 is an apocalyptic number.

42854881 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

42854881 is a deficient number, since it is larger than the sum of its proper divisors (1045283).

42854881 is a wasteful number, since it uses less digits than its factorization.

42854881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045282.

The product of its digits is 81920, while the sum is 40.

The square root of 42854881 is about 6546.3639526076. The cubic root of 42854881 is about 349.9452458565.

The spelling of 42854881 in words is "forty-two million, eight hundred fifty-four thousand, eight hundred eighty-one".