42031081 has 8 divisors (see below), whose sum is σ = 43556480. Its totient is φ = 40530672.

The previous prime is 42031079. The next prime is 42031111. The reversal of 42031081 is 18013024.

42031081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42031081 - 2¹ = 42031079 is a prime.

It is a super-2 number, since 2×42031081² = 3533223540057122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42031181) 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, 2790 + ... + 9583.

It is an arithmetic number, because the mean of its divisors is an integer number (5444560).

Almost surely, 2^42031081 is an apocalyptic number.

It is an amenable number.

42031081 is a deficient number, since it is larger than the sum of its proper divisors (1525399).

42031081 is a wasteful number, since it uses less digits than its factorization.

42031081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12495.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 42031081 is about 6483.1382061468. The cubic root of 42031081 is about 347.6883880956.

The spelling of 42031081 in words is "forty-two million, thirty-one thousand, eighty-one".