3445781 has 4 divisors (see below), whose sum is σ = 3648492. Its totient is φ = 3243072.

The previous prime is 3445769. The next prime is 3445787. The reversal of 3445781 is 1875443.

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 1343281 + 2102500 = 1159^2 + 1450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3445781 is a prime.

It is a super-2 number, since 2×3445781² = 23746813399922, 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 (3445787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101330 + ... + 101363.

It is an arithmetic number, because the mean of its divisors is an integer number (912123).

Almost surely, 2^3445781 is an apocalyptic number.

It is an amenable number.

3445781 is a deficient number, since it is larger than the sum of its proper divisors (202711).

3445781 is a wasteful number, since it uses less digits than its factorization.

3445781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202710.

The product of its digits is 13440, while the sum is 32.

The square root of 3445781 is about 1856.2814980493. The cubic root of 3445781 is about 151.0413611240.

The spelling of 3445781 in words is "three million, four hundred forty-five thousand, seven hundred eighty-one".