42849681 has 8 divisors (see below), whose sum is σ = 65294784. Its totient is φ = 24485520.

The previous prime is 42849661. The next prime is 42849701. The reversal of 42849681 is 18694824.

42849681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42849661) and next prime (42849701).

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

It is not a de Polignac number, because 42849681 - 2¹³ = 42841489 is a prime.

It is a super-2 number, since 2×42849681² = 3672190323603522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42849661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020210 + ... + 1020251.

It is an arithmetic number, because the mean of its divisors is an integer number (8161848).

Almost surely, 2^42849681 is an apocalyptic number.

It is an amenable number.

42849681 is a deficient number, since it is larger than the sum of its proper divisors (22445103).

42849681 is a wasteful number, since it uses less digits than its factorization.

42849681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040471.

The product of its digits is 110592, while the sum is 42.

The square root of 42849681 is about 6545.9667735179. The cubic root of 42849681 is about 349.9310911959.

The spelling of 42849681 in words is "forty-two million, eight hundred forty-nine thousand, six hundred eighty-one".