3781045 has 8 divisors (see below), whose sum is σ = 4548024. Its totient is φ = 3017664.

The previous prime is 3781007. The next prime is 3781079. The reversal of 3781045 is 5401873.

It can be written as a sum of positive squares in 4 ways, for example, as 544644 + 3236401 = 738^2 + 1799^2 .

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 3781045 - 2¹¹ = 3778997 is a prime.

It is a Duffinian number.

3781045 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2827 + ... + 3943.

It is an arithmetic number, because the mean of its divisors is an integer number (568503).

Almost surely, 2^3781045 is an apocalyptic number.

It is an amenable number.

3781045 is a deficient number, since it is larger than the sum of its proper divisors (766979).

3781045 is a wasteful number, since it uses less digits than its factorization.

3781045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 3781045 is about 1944.4909359521. The cubic root of 3781045 is about 155.7891766439.

The spelling of 3781045 in words is "three million, seven hundred eighty-one thousand, forty-five".