5281921 has 2 divisors, whose sum is σ = 5281922. Its totient is φ = 5281920.

The previous prime is 5281919. The next prime is 5281937. The reversal of 5281921 is 1291825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5198400 + 83521 = 2280^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 5281921 - 2¹ = 5281919 is a prime.

Together with 5281919, it forms a pair of twin primes.

It is a Chen prime.

5281921 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5281921.

It is not a weakly prime, because it can be changed into another prime (5281021) 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 as a sum of consecutive naturals, namely, 2640960 + 2640961.

It is an arithmetic number, because the mean of its divisors is an integer number (2640961).

Almost surely, 2^5281921 is an apocalyptic number.

It is an amenable number.

5281921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5281921 is an equidigital number, since it uses as much as digits as its factorization.

5281921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 28.

The square root of 5281921 is about 2298.2430245733. The cubic root of 5281921 is about 174.1528691353.

The spelling of 5281921 in words is "five million, two hundred eighty-one thousand, nine hundred twenty-one".