5402521 has 2 divisors, whose sum is σ = 5402522. Its totient is φ = 5402520.

The previous prime is 5402519. The next prime is 5402533. The reversal of 5402521 is 1252045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4473225 + 929296 = 2115^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 5402521 - 2¹ = 5402519 is a prime.

Together with 5402519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5402561) 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, 2701260 + 2701261.

It is an arithmetic number, because the mean of its divisors is an integer number (2701261).

Almost surely, 2^5402521 is an apocalyptic number.

It is an amenable number.

5402521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5402521 is an equidigital number, since it uses as much as digits as its factorization.

5402521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 5402521 is about 2324.3323772645. The cubic root of 5402521 is about 175.4683617072.

Adding to 5402521 its reverse (1252045), we get a palindrome (6654566).

The spelling of 5402521 in words is "five million, four hundred two thousand, five hundred twenty-one".