102648521 has 2 divisors, whose sum is σ = 102648522. Its totient is φ = 102648520.

The previous prime is 102648509. The next prime is 102648523. The reversal of 102648521 is 125846201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99281296 + 3367225 = 9964^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 102648521 - 2²⁶ = 35539657 is a prime.

Together with 102648523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102648523) 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, 51324260 + 51324261.

It is an arithmetic number, because the mean of its divisors is an integer number (51324261).

Almost surely, 2^102648521 is an apocalyptic number.

It is an amenable number.

102648521 is a deficient number, since it is larger than the sum of its proper divisors (1).

102648521 is an equidigital number, since it uses as much as digits as its factorization.

102648521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 102648521 is about 10131.5606399014. The cubic root of 102648521 is about 468.2210114103.

The spelling of 102648521 in words is "one hundred two million, six hundred forty-eight thousand, five hundred twenty-one".