102002225 has 12 divisors (see below), whose sum is σ = 136212636. Its totient is φ = 75324480.

The previous prime is 102002191. The next prime is 102002249. The reversal of 102002225 is 522200201.

It can be written as a sum of positive squares in 6 ways, for example, as 39639616 + 62362609 = 6296^2 + 7897^2 .

It is not a de Polignac number, because 102002225 - 2¹⁰ = 102001201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156602 + ... + 157251.

It is an arithmetic number, because the mean of its divisors is an integer number (11351053).

Almost surely, 2^102002225 is an apocalyptic number.

It is an amenable number.

102002225 is a deficient number, since it is larger than the sum of its proper divisors (34210411).

102002225 is a wasteful number, since it uses less digits than its factorization.

102002225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313876 (or 313871 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 102002225 is about 10099.6150916755. The cubic root of 102002225 is about 467.2362701740.

Adding to 102002225 its reverse (522200201), we get a palindrome (624202426).

The spelling of 102002225 in words is "one hundred two million, two thousand, two hundred twenty-five".