42075181 has 4 divisors (see below), whose sum is σ = 42160000. Its totient is φ = 41990364.

The previous prime is 42075151. The next prime is 42075197. The reversal of 42075181 is 18157024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42075181 - 2⁷ = 42075053 is a prime.

It is a super-2 number, since 2×42075181² = 3540641712365522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42075151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41661 + ... + 42658.

It is an arithmetic number, because the mean of its divisors is an integer number (10540000).

Almost surely, 2^42075181 is an apocalyptic number.

It is an amenable number.

42075181 is a deficient number, since it is larger than the sum of its proper divisors (84819).

42075181 is an equidigital number, since it uses as much as digits as its factorization.

42075181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84818.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 42075181 is about 6486.5384451185. The cubic root of 42075181 is about 347.8099465398.

The spelling of 42075181 in words is "forty-two million, seventy-five thousand, one hundred eighty-one".