3782921 has 2 divisors, whose sum is σ = 3782922. Its totient is φ = 3782920.

The previous prime is 3782897. The next prime is 3782927. The reversal of 3782921 is 1292873.

3782921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3763600 + 19321 = 1940^2 + 139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3782921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3782927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1891460 + 1891461.

It is an arithmetic number, because the mean of its divisors is an integer number (1891461).

Almost surely, 2^3782921 is an apocalyptic number.

It is an amenable number.

3782921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3782921 is an equidigital number, since it uses as much as digits as its factorization.

3782921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 3782921 is about 1944.9732645977. The cubic root of 3782921 is about 155.8149377913.

The spelling of 3782921 in words is "three million, seven hundred eighty-two thousand, nine hundred twenty-one".