102642017 has 2 divisors, whose sum is σ = 102642018. Its totient is φ = 102642016.

The previous prime is 102641999. The next prime is 102642019. The reversal of 102642017 is 710246201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100781521 + 1860496 = 10039^2 + 1364^2 .

It is a cyclic number.

It is not a de Polignac number, because 102642017 - 2¹² = 102637921 is a prime.

Together with 102642019, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102641983 and 102642001.

It is not a weakly prime, because it can be changed into another prime (102642019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51321008 + 51321009.

It is an arithmetic number, because the mean of its divisors is an integer number (51321009).

Almost surely, 2^102642017 is an apocalyptic number.

It is an amenable number.

102642017 is a deficient number, since it is larger than the sum of its proper divisors (1).

102642017 is an equidigital number, since it uses as much as digits as its factorization.

102642017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 102642017 is about 10131.2396576135. The cubic root of 102642017 is about 468.2111220852.

Adding to 102642017 its reverse (710246201), we get a palindrome (812888218).

The spelling of 102642017 in words is "one hundred two million, six hundred forty-two thousand, seventeen".