42061181 has 16 divisors (see below), whose sum is σ = 45619200. Its totient is φ = 38678640.

The previous prime is 42061177. The next prime is 42061207. The reversal of 42061181 is 18116024.

It is not a de Polignac number, because 42061181 - 2² = 42061177 is a prime.

It is a super-2 number, since 2×42061181² = 3538285894229522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42061081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69920 + ... + 70518.

It is an arithmetic number, because the mean of its divisors is an integer number (2851200).

Almost surely, 2^42061181 is an apocalyptic number.

It is an amenable number.

42061181 is a deficient number, since it is larger than the sum of its proper divisors (3558019).

42061181 is a wasteful number, since it uses less digits than its factorization.

42061181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 42061181 is about 6485.4591973121. The cubic root of 42061181 is about 347.7713657636.

The spelling of 42061181 in words is "forty-two million, sixty-one thousand, one hundred eighty-one".