3243981 has 16 divisors (see below), whose sum is σ = 4691456. Its totient is φ = 1982016.

The previous prime is 3243979. The next prime is 3243983. The reversal of 3243981 is 1893423.

It is an interprime number because it is at equal distance from previous prime (3243979) and next prime (3243983).

It is not a de Polignac number, because 3243981 - 2¹ = 3243979 is a prime.

It is a super-2 number, since 2×3243981² = 21046825456722, which contains 22 as substring.

It is a Duffinian number.

3243981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3243983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8511 + ... + 8883.

It is an arithmetic number, because the mean of its divisors is an integer number (293216).

Almost surely, 2^3243981 is an apocalyptic number.

It is an amenable number.

3243981 is a deficient number, since it is larger than the sum of its proper divisors (1447475).

3243981 is a wasteful number, since it uses less digits than its factorization.

3243981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612.

The product of its digits is 5184, while the sum is 30.

The square root of 3243981 is about 1801.1054938565. The cubic root of 3243981 is about 148.0333045331.

It can be divided in two parts, 3243 and 981, that added together give a palindrome (4224).

The spelling of 3243981 in words is "three million, two hundred forty-three thousand, nine hundred eighty-one".