5243981 has 4 divisors (see below), whose sum is σ = 5520000. Its totient is φ = 4967964.

The previous prime is 5243971. The next prime is 5243993. The reversal of 5243981 is 1893425.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5243981 - 2²² = 1049677 is a prime.

It is a super-2 number, since 2×5243981² = 54998673456722, 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 (5243911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137981 + ... + 138018.

It is an arithmetic number, because the mean of its divisors is an integer number (1380000).

Almost surely, 2^5243981 is an apocalyptic number.

It is an amenable number.

5243981 is a deficient number, since it is larger than the sum of its proper divisors (276019).

5243981 is a wasteful number, since it uses less digits than its factorization.

5243981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276018.

The product of its digits is 8640, while the sum is 32.

The square root of 5243981 is about 2289.9740173198. The cubic root of 5243981 is about 173.7348871488.

The spelling of 5243981 in words is "five million, two hundred forty-three thousand, nine hundred eighty-one".