100102 has 4 divisors (see below), whose sum is σ = 150156. Its totient is φ = 50050.

The previous prime is 100069. The next prime is 100103. The reversal of 100102 is 201001.

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

It is a junction number, because it is equal to n+sod(n) for n = 100091 and 100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100103) by changing a digit.

100102 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25024 + ... + 25027.

It is an arithmetic number, because the mean of its divisors is an integer number (37539).

2¹⁰⁰¹⁰² is an apocalyptic number.

100102 is a deficient number, since it is larger than the sum of its proper divisors (50054).

100102 is an equidigital number, since it uses as much as digits as its factorization.

100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50053.

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 100102 is about 316.3890010730. The cubic root of 100102 is about 46.4316643755.

Adding to 100102 its reverse (201001), we get a palindrome (301103).

Multiplying 100102 by its reverse (201001), we get a palindrome (20120602102).

It can be divided in two parts, 100 and 102, that added together give a palindrome (202).

The spelling of 100102 in words is "one hundred thousand, one hundred two", and thus it is an iban number.