3781145 has 8 divisors (see below), whose sum is σ = 4605504. Its totient is φ = 2979504.

The previous prime is 3781121. The next prime is 3781147. The reversal of 3781145 is 5411873.

3781145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3781145 - 2¹² = 3777049 is a prime.

It is a super-2 number, since 2×3781145² = 28594115022050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3781147) 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 7 ways as a sum of consecutive naturals, for example, 5309 + ... + 5978.

It is an arithmetic number, because the mean of its divisors is an integer number (575688).

Almost surely, 2^3781145 is an apocalyptic number.

It is an amenable number.

3781145 is a deficient number, since it is larger than the sum of its proper divisors (824359).

3781145 is a wasteful number, since it uses less digits than its factorization.

3781145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11359.

The product of its digits is 3360, while the sum is 29.

The square root of 3781145 is about 1944.5166494530. The cubic root of 3781145 is about 155.7905500543.

The spelling of 3781145 in words is "three million, seven hundred eighty-one thousand, one hundred forty-five".