100002129 has 4 divisors (see below), whose sum is σ = 133336176. Its totient is φ = 66668084.

The previous prime is 100002127. The next prime is 100002139. The reversal of 100002129 is 921200001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100002129 - 2¹ = 100002127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100002127) 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, 16667019 + ... + 16667024.

It is an arithmetic number, because the mean of its divisors is an integer number (33334044).

Almost surely, 2^100002129 is an apocalyptic number.

It is an amenable number.

100002129 is a deficient number, since it is larger than the sum of its proper divisors (33334047).

100002129 is an equidigital number, since it uses as much as digits as its factorization.

100002129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33334046.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 100002129 is about 10000.1064494334. The cubic root of 100002129 is about 464.1621773188.

The spelling of 100002129 in words is "one hundred million, two thousand, one hundred twenty-nine".