42739081 has 8 divisors (see below), whose sum is σ = 53285184. Its totient is φ = 33303120.

The previous prime is 42739063. The next prime is 42739093. The reversal of 42739081 is 18093724.

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 42739081 - 2⁹ = 42738569 is a prime.

It is a super-2 number, since 2×42739081² = 3653258089449122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42739061) 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, 277450 + ... + 277603.

It is an arithmetic number, because the mean of its divisors is an integer number (6660648).

Almost surely, 2^42739081 is an apocalyptic number.

It is an amenable number.

42739081 is a deficient number, since it is larger than the sum of its proper divisors (10546103).

42739081 is a wasteful number, since it uses less digits than its factorization.

42739081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555071.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 42739081 is about 6537.5133651871. The cubic root of 42739081 is about 349.6297608704.

The spelling of 42739081 in words is "forty-two million, seven hundred thirty-nine thousand, eighty-one".