102520135 has 8 divisors (see below), whose sum is σ = 123142896. Its totient is φ = 81936960.

The previous prime is 102520097. The next prime is 102520139. The reversal of 102520135 is 531025201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-102520135 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 (102520139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3861 + ... + 14830.

It is an arithmetic number, because the mean of its divisors is an integer number (15392862).

Almost surely, 2^102520135 is an apocalyptic number.

102520135 is a deficient number, since it is larger than the sum of its proper divisors (20622761).

102520135 is a wasteful number, since it uses less digits than its factorization.

102520135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19793.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 102520135 is about 10125.2227135999. Note that the first 3 decimals coincide. The cubic root of 102520135 is about 468.0257233164.

Adding to 102520135 its reverse (531025201), we get a palindrome (633545336).

The spelling of 102520135 in words is "one hundred two million, five hundred twenty thousand, one hundred thirty-five".