102002105 has 4 divisors (see below), whose sum is σ = 122402532. Its totient is φ = 81601680.

The previous prime is 102002071. The next prime is 102002107. The reversal of 102002105 is 501200201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51079609 + 50922496 = 7147^2 + 7136^2 .

It is not a de Polignac number, because 102002105 - 2²⁰ = 100953529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102002107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10200206 + ... + 10200215.

It is an arithmetic number, because the mean of its divisors is an integer number (30600633).

Almost surely, 2^102002105 is an apocalyptic number.

It is an amenable number.

102002105 is a deficient number, since it is larger than the sum of its proper divisors (20400427).

102002105 is an equidigital number, since it uses as much as digits as its factorization.

102002105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20400426.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 102002105 is about 10099.6091508533. The cubic root of 102002105 is about 467.2360869480.

Adding to 102002105 its reverse (501200201), we get a palindrome (603202306).

The spelling of 102002105 in words is "one hundred two million, two thousand, one hundred five".