42742081 has 8 divisors (see below), whose sum is σ = 43401600. Its totient is φ = 42085680.

The previous prime is 42742079. The next prime is 42742093. The reversal of 42742081 is 18024724.

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 42742081 - 2¹ = 42742079 is a prime.

It is a super-2 number, since 2×42742081² = 3653770976421122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42742031) 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, 51651 + ... + 52471.

It is an arithmetic number, because the mean of its divisors is an integer number (5425200).

Almost surely, 2^42742081 is an apocalyptic number.

It is an amenable number.

42742081 is a deficient number, since it is larger than the sum of its proper divisors (659519).

42742081 is an equidigital number, since it uses as much as digits as its factorization.

42742081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 42742081 is about 6537.7428061985. The cubic root of 42742081 is about 349.6379412424.

The spelling of 42742081 in words is "forty-two million, seven hundred forty-two thousand, eighty-one".