1205103020 has 24 divisors (see below), whose sum is σ = 2760781968. Its totient is φ = 438219200.

The previous prime is 1205102999. The next prime is 1205103023. The reversal of 1205103020 is 203015021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1205102986 and 1205103004.

It is not an unprimeable number, because it can be changed into a prime (1205103023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2738651 + ... + 2739090.

It is an arithmetic number, because the mean of its divisors is an integer number (115032582).

Almost surely, 2^1205103020 is an apocalyptic number.

1205103020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205103020 is an abundant number, since it is smaller than the sum of its proper divisors (1555678948).

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

1205103020 is a wasteful number, since it uses less digits than its factorization.

1205103020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477761 (or 5477759 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1205103020 is about 34714.5937611259. The cubic root of 1205103020 is about 1064.1627634151.

Adding to 1205103020 its reverse (203015021), we get a palindrome (1408118041).

The spelling of 1205103020 in words is "one billion, two hundred five million, one hundred three thousand, twenty".