102432509 has 2 divisors, whose sum is σ = 102432510. Its totient is φ = 102432508.

The previous prime is 102432487. The next prime is 102432521. The reversal of 102432509 is 905234201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83265625 + 19166884 = 9125^2 + 4378^2 .

It is a cyclic number.

It is not a de Polignac number, because 102432509 - 2¹² = 102428413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102432529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51216254 + 51216255.

It is an arithmetic number, because the mean of its divisors is an integer number (51216255).

Almost surely, 2^102432509 is an apocalyptic number.

It is an amenable number.

102432509 is a deficient number, since it is larger than the sum of its proper divisors (1).

102432509 is an equidigital number, since it uses as much as digits as its factorization.

102432509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 102432509 is about 10120.8946738912. The cubic root of 102432509 is about 467.8923416740.

It can be divided in two parts, 1024 and 32509, that added together give a palindrome (33533).

The spelling of 102432509 in words is "one hundred two million, four hundred thirty-two thousand, five hundred nine".