3774781 has 2 divisors, whose sum is σ = 3774782. Its totient is φ = 3774780.

The previous prime is 3774773. The next prime is 3774809. The reversal of 3774781 is 1874773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2149156 + 1625625 = 1466^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 3774781 - 2³ = 3774773 is a prime.

It is a super-2 number, since 2×3774781² = 28497943195922, which contains 22 as substring.

3774781 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3774781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3774181) 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, 1887390 + 1887391.

It is an arithmetic number, because the mean of its divisors is an integer number (1887391).

Almost surely, 2^3774781 is an apocalyptic number.

It is an amenable number.

3774781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3774781 is an equidigital number, since it uses as much as digits as its factorization.

3774781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 37.

The square root of 3774781 is about 1942.8795639463. The cubic root of 3774781 is about 155.7030979012.

The spelling of 3774781 in words is "three million, seven hundred seventy-four thousand, seven hundred eighty-one".