3748781 has 2 divisors, whose sum is σ = 3748782. Its totient is φ = 3748780.

The previous prime is 3748763. The next prime is 3748813. The reversal of 3748781 is 1878473.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2920681 + 828100 = 1709^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 3748781 - 2¹⁴ = 3732397 is a prime.

It is a super-2 number, since 2×3748781² = 28106717971922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3748711) 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, 1874390 + 1874391.

It is an arithmetic number, because the mean of its divisors is an integer number (1874391).

Almost surely, 2^3748781 is an apocalyptic number.

It is an amenable number.

3748781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3748781 is an equidigital number, since it uses as much as digits as its factorization.

3748781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 38.

The square root of 3748781 is about 1936.1769030747. The cubic root of 3748781 is about 155.3447891781.

The spelling of 3748781 in words is "three million, seven hundred forty-eight thousand, seven hundred eighty-one".