3780804121 has 2 divisors, whose sum is σ = 3780804122. Its totient is φ = 3780804120.

The previous prime is 3780804119. The next prime is 3780804151. The reversal of 3780804121 is 1214080873.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2768864400 + 1011939721 = 52620^2 + 31811^2 .

It is an emirp because it is prime and its reverse (1214080873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3780804121 - 2¹ = 3780804119 is a prime.

Together with 3780804119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3780804151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890402060 + 1890402061.

It is an arithmetic number, because the mean of its divisors is an integer number (1890402061).

Almost surely, 2^3780804121 is an apocalyptic number.

It is an amenable number.

3780804121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3780804121 is an equidigital number, since it uses as much as digits as its factorization.

3780804121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 3780804121 is about 61488.2437625275. The cubic root of 3780804121 is about 1557.8586828703.

Adding to 3780804121 its reverse (1214080873), we get a palindrome (4994884994).

The spelling of 3780804121 in words is "three billion, seven hundred eighty million, eight hundred four thousand, one hundred twenty-one".