1205115102 has 24 divisors (see below), whose sum is σ = 2616915600. Its totient is φ = 400807680.

The previous prime is 1205115089. The next prime is 1205115137. The reversal of 1205115102 is 2015115021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66474 + ... + 82637.

It is an arithmetic number, because the mean of its divisors is an integer number (109038150).

Almost surely, 2^1205115102 is an apocalyptic number.

1205115102 is an abundant number, since it is smaller than the sum of its proper divisors (1411800498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205115102 is a wasteful number, since it uses less digits than its factorization.

1205115102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149568 (or 149565 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 1205115102 is about 34714.7677797216. The cubic root of 1205115102 is about 1064.1663197283.

The spelling of 1205115102 in words is "one billion, two hundred five million, one hundred fifteen thousand, one hundred two".