5287921 has 2 divisors, whose sum is σ = 5287922. Its totient is φ = 5287920.

The previous prime is 5287913. The next prime is 5287937. The reversal of 5287921 is 1297825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5239521 + 48400 = 2289^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 5287921 - 2³ = 5287913 is a prime.

5287921 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (5287951) 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 as a sum of consecutive naturals, namely, 2643960 + 2643961.

It is an arithmetic number, because the mean of its divisors is an integer number (2643961).

Almost surely, 2^5287921 is an apocalyptic number.

It is an amenable number.

5287921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5287921 is an equidigital number, since it uses as much as digits as its factorization.

5287921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 5287921 is about 2299.5479990642. The cubic root of 5287921 is about 174.2187871859.

It can be divided in two parts, 52879 and 21, that added together give a square (52900 = 230²).

The spelling of 5287921 in words is "five million, two hundred eighty-seven thousand, nine hundred twenty-one".