102135245 has 24 divisors (see below), whose sum is σ = 128685024. Its totient is φ = 77809088.

The previous prime is 102135239. The next prime is 102135247. The reversal of 102135245 is 542531201.

It is a de Polignac number, because none of the positive numbers 2^k-102135245 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102135245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102135247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449822 + ... + 450048.

It is an arithmetic number, because the mean of its divisors is an integer number (5361876).

Almost surely, 2^102135245 is an apocalyptic number.

It is an amenable number.

102135245 is a deficient number, since it is larger than the sum of its proper divisors (26549779).

102135245 is a wasteful number, since it uses less digits than its factorization.

102135245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 102135245 is about 10106.1983455699. The cubic root of 102135245 is about 467.4392878731.

Adding to 102135245 its reverse (542531201), we get a palindrome (644666446).

The spelling of 102135245 in words is "one hundred two million, one hundred thirty-five thousand, two hundred forty-five".