3781505 has 16 divisors (see below), whose sum is σ = 5585664. Its totient is φ = 2393280.

The previous prime is 3781501. The next prime is 3781507. The reversal of 3781505 is 5051873.

3781505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3781505 - 2² = 3781501 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781501) 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 in 15 ways as a sum of consecutive naturals, for example, 3701 + ... + 4610.

It is an arithmetic number, because the mean of its divisors is an integer number (349104).

Almost surely, 2^3781505 is an apocalyptic number.

3781505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3781505 is a deficient number, since it is larger than the sum of its proper divisors (1804159).

3781505 is a wasteful number, since it uses less digits than its factorization.

3781505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8336.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 3781505 is about 1944.6092152409. The cubic root of 3781505 is about 155.7954941315.

The spelling of 3781505 in words is "three million, seven hundred eighty-one thousand, five hundred five".