1205520116 has 12 divisors (see below), whose sum is σ = 2233757988. Its totient is φ = 567303552.

The previous prime is 1205520103. The next prime is 1205520161. The reversal of 1205520116 is 6110255021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1050019216 + 155500900 = 32404^2 + 12470^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1205520091 and 1205520100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8864051 + ... + 8864186.

It is an arithmetic number, because the mean of its divisors is an integer number (186146499).

Almost surely, 2^1205520116 is an apocalyptic number.

It is an amenable number.

1205520116 is a deficient number, since it is larger than the sum of its proper divisors (1028237872).

1205520116 is a wasteful number, since it uses less digits than its factorization.

1205520116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17728258 (or 17728256 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1205520116 is about 34720.6007436507. The cubic root of 1205520116 is about 1064.2855210623.

Adding to 1205520116 its reverse (6110255021), we get a palindrome (7315775137).

The spelling of 1205520116 in words is "one billion, two hundred five million, five hundred twenty thousand, one hundred sixteen".