1205210106 has 24 divisors (see below), whose sum is σ = 2672017920. Its totient is φ = 392393736.

The previous prime is 1205210021. The next prime is 1205210113. The reversal of 1205210106 is 6010125021.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 777786 + ... + 779333.

It is an arithmetic number, because the mean of its divisors is an integer number (111334080).

Almost surely, 2^1205210106 is an apocalyptic number.

1205210106 is an abundant number, since it is smaller than the sum of its proper divisors (1466807814).

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

1205210106 is a wasteful number, since it uses less digits than its factorization.

1205210106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557170 (or 1557167 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1205210106 is about 34716.1361041231. The cubic root of 1205210106 is about 1064.1942831431.

Adding to 1205210106 its reverse (6010125021), we get a palindrome (7215335127).

The spelling of 1205210106 in words is "one billion, two hundred five million, two hundred ten thousand, one hundred six".