3381781 has 4 divisors (see below), whose sum is σ = 3641932. Its totient is φ = 3121632.

The previous prime is 3381773. The next prime is 3381787. The reversal of 3381781 is 1871833.

3381781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 2692881 = 830^2 + 1641^2 .

It is a cyclic number.

It is not a de Polignac number, because 3381781 - 2³ = 3381773 is a prime.

It is a super-2 number, since 2×3381781² = 22872885463922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3381787) 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 3 ways as a sum of consecutive naturals, for example, 130056 + ... + 130081.

It is an arithmetic number, because the mean of its divisors is an integer number (910483).

Almost surely, 2^3381781 is an apocalyptic number.

It is an amenable number.

3381781 is a deficient number, since it is larger than the sum of its proper divisors (260151).

3381781 is a wasteful number, since it uses less digits than its factorization.

3381781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260150.

The product of its digits is 4032, while the sum is 31.

The square root of 3381781 is about 1838.9619354408. The cubic root of 3381781 is about 150.1003920538.

The spelling of 3381781 in words is "three million, three hundred eighty-one thousand, seven hundred eighty-one".