102040517 has 2 divisors, whose sum is σ = 102040518. Its totient is φ = 102040516.

The previous prime is 102040501. The next prime is 102040541. The reversal of 102040517 is 715040201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101586241 + 454276 = 10079^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 102040517 - 2⁴ = 102040501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102040597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51020258 + 51020259.

It is an arithmetic number, because the mean of its divisors is an integer number (51020259).

Almost surely, 2^102040517 is an apocalyptic number.

It is an amenable number.

102040517 is a deficient number, since it is larger than the sum of its proper divisors (1).

102040517 is an equidigital number, since it uses as much as digits as its factorization.

102040517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 102040517 is about 10101.5106296039. The cubic root of 102040517 is about 467.2947302481.

Adding to 102040517 its reverse (715040201), we get a palindrome (817080718).

The spelling of 102040517 in words is "one hundred two million, forty thousand, five hundred seventeen".