102605239 has 4 divisors (see below), whose sum is σ = 111933000. Its totient is φ = 93277480.

The previous prime is 102605221. The next prime is 102605273. The reversal of 102605239 is 932506201.

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

It is a cyclic number.

It is not a de Polignac number, because 102605239 - 2¹¹ = 102603191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102605299) 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, 4663864 + ... + 4663885.

It is an arithmetic number, because the mean of its divisors is an integer number (27983250).

Almost surely, 2^102605239 is an apocalyptic number.

102605239 is a deficient number, since it is larger than the sum of its proper divisors (9327761).

102605239 is an equidigital number, since it uses as much as digits as its factorization.

102605239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9327760.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 102605239 is about 10129.4244160268. The cubic root of 102605239 is about 468.1551933136.

The spelling of 102605239 in words is "one hundred two million, six hundred five thousand, two hundred thirty-nine".