102565121 has 2 divisors, whose sum is σ = 102565122. Its totient is φ = 102565120.

The previous prime is 102565103. The next prime is 102565153. The reversal of 102565121 is 121565201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63377521 + 39187600 = 7961^2 + 6260^2 .

It is an emirp because it is prime and its reverse (121565201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102565121 - 2²² = 98370817 is a prime.

It is a super-3 number, since 3×102565121³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (102565921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51282560 + 51282561.

It is an arithmetic number, because the mean of its divisors is an integer number (51282561).

Almost surely, 2^102565121 is an apocalyptic number.

It is an amenable number.

102565121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102565121 is an equidigital number, since it uses as much as digits as its factorization.

102565121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 102565121 is about 10127.4439519555. The cubic root of 102565121 is about 468.0941701191.

The spelling of 102565121 in words is "one hundred two million, five hundred sixty-five thousand, one hundred twenty-one".