42842681 has 16 divisors (see below), whose sum is σ = 50082816. Its totient is φ = 35891856.

The previous prime is 42842647. The next prime is 42842687. The reversal of 42842681 is 18624824.

It is not a de Polignac number, because 42842681 - 2⁶ = 42842617 is a prime.

It is a super-3 number, since 3×42842681³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42842687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78050 + ... + 78596.

It is an arithmetic number, because the mean of its divisors is an integer number (3130176).

Almost surely, 2^42842681 is an apocalyptic number.

It is an amenable number.

42842681 is a deficient number, since it is larger than the sum of its proper divisors (7240135).

42842681 is a wasteful number, since it uses less digits than its factorization.

42842681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its digits is 24576, while the sum is 35.

The square root of 42842681 is about 6545.4320712998. The cubic root of 42842681 is about 349.9120350366.

The spelling of 42842681 in words is "forty-two million, eight hundred forty-two thousand, six hundred eighty-one".