102235129 has 4 divisors (see below), whose sum is σ = 103247460. Its totient is φ = 101222800.

The previous prime is 102235079. The next prime is 102235139. The reversal of 102235129 is 921532201.

It is a happy number.

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 52954729 + 49280400 = 7277^2 + 7020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102235129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102235139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506014 + ... + 506215.

It is an arithmetic number, because the mean of its divisors is an integer number (25811865).

Almost surely, 2^102235129 is an apocalyptic number.

It is an amenable number.

102235129 is a deficient number, since it is larger than the sum of its proper divisors (1012331).

102235129 is a wasteful number, since it uses less digits than its factorization.

102235129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012330.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 102235129 is about 10111.1388577153. The cubic root of 102235129 is about 467.5916169211.

The spelling of 102235129 in words is "one hundred two million, two hundred thirty-five thousand, one hundred twenty-nine".