102445517 has 2 divisors, whose sum is σ = 102445518. Its totient is φ = 102445516.

The previous prime is 102445471. The next prime is 102445523. The reversal of 102445517 is 715544201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84897796 + 17547721 = 9214^2 + 4189^2 .

It is a cyclic number.

It is not a de Polignac number, because 102445517 - 2¹⁸ = 102183373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102445517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102445547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51222758 + 51222759.

It is an arithmetic number, because the mean of its divisors is an integer number (51222759).

Almost surely, 2^102445517 is an apocalyptic number.

It is an amenable number.

102445517 is a deficient number, since it is larger than the sum of its proper divisors (1).

102445517 is an equidigital number, since it uses as much as digits as its factorization.

102445517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 102445517 is about 10121.5372844247. The cubic root of 102445517 is about 467.9121468642.

Adding to 102445517 its reverse (715544201), we get a palindrome (817989718).

The spelling of 102445517 in words is "one hundred two million, four hundred forty-five thousand, five hundred seventeen".