102452561 has 2 divisors, whose sum is σ = 102452562. Its totient is φ = 102452560.

The previous prime is 102452543. The next prime is 102452587. The reversal of 102452561 is 165254201.

It is an a-pointer prime, because the next prime (102452587) can be obtained adding 102452561 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99121936 + 3330625 = 9956^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 102452561 - 2¹⁴ = 102436177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102452561.

It is not a weakly prime, because it can be changed into another prime (102452501) 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, 51226280 + 51226281.

It is an arithmetic number, because the mean of its divisors is an integer number (51226281).

Almost surely, 2^102452561 is an apocalyptic number.

It is an amenable number.

102452561 is a deficient number, since it is larger than the sum of its proper divisors (1).

102452561 is an equidigital number, since it uses as much as digits as its factorization.

102452561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 102452561 is about 10121.8852493002. The cubic root of 102452561 is about 467.9228709308.

The spelling of 102452561 in words is "one hundred two million, four hundred fifty-two thousand, five hundred sixty-one".