10243981 has 12 divisors (see below), whose sum is σ = 11627392. Its totient is φ = 9009000.

The previous prime is 10243969. The next prime is 10244011. The reversal of 10243981 is 18934201.

It is a happy number.

It is not a de Polignac number, because 10243981 - 2⁵ = 10243949 is a prime.

It is a super-2 number, since 2×10243981² = 209878293456722, 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 (10244981) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2386 + ... + 5116.

Almost surely, 2^10243981 is an apocalyptic number.

10243981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10243981 is a deficient number, since it is larger than the sum of its proper divisors (1383411).

10243981 is a wasteful number, since it uses less digits than its factorization.

10243981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784 (or 2773 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 10243981 is about 3200.6219708050. The cubic root of 10243981 is about 217.1815465580.

It can be divided in two parts, 1024 and 3981, that added together give a palindrome (5005).

The spelling of 10243981 in words is "ten million, two hundred forty-three thousand, nine hundred eighty-one".