3780181 has 2 divisors, whose sum is σ = 3780182. Its totient is φ = 3780180.

The previous prime is 3780169. The next prime is 3780191. The reversal of 3780181 is 1810873.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3204100 + 576081 = 1790^2 + 759^2 .

It is a cyclic number.

It is not a de Polignac number, because 3780181 - 2⁵ = 3780149 is a prime.

It is a super-2 number, since 2×3780181² = 28579536785522, which contains 22 as substring.

3780181 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3780151) 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 as a sum of consecutive naturals, namely, 1890090 + 1890091.

It is an arithmetic number, because the mean of its divisors is an integer number (1890091).

Almost surely, 2^3780181 is an apocalyptic number.

It is an amenable number.

3780181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3780181 is an equidigital number, since it uses as much as digits as its factorization.

3780181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 3780181 is about 1944.2687571424. The cubic root of 3780181 is about 155.7773093688. Note that the first 3 decimals are identical.

The spelling of 3780181 in words is "three million, seven hundred eighty thousand, one hundred eighty-one".