42010181 has 2 divisors, whose sum is σ = 42010182. Its totient is φ = 42010180.

The previous prime is 42010169. The next prime is 42010211. The reversal of 42010181 is 18101024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40119556 + 1890625 = 6334^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 42010181 - 2¹⁴ = 41993797 is a prime.

It is a super-2 number, since 2×42010181² = 3529710615305522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42010141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21005090 + 21005091.

It is an arithmetic number, because the mean of its divisors is an integer number (21005091).

Almost surely, 2^42010181 is an apocalyptic number.

It is an amenable number.

42010181 is a deficient number, since it is larger than the sum of its proper divisors (1).

42010181 is an equidigital number, since it uses as much as digits as its factorization.

42010181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 42010181 is about 6481.5261320155. The cubic root of 42010181 is about 347.6307490665.

It can be divided in two parts, 420 and 10181, that added together give a palindrome (10601).

The spelling of 42010181 in words is "forty-two million, ten thousand, one hundred eighty-one".