1520012205 has 24 divisors (see below), whose sum is σ = 2670785208. Its totient is φ = 799566336.

The previous prime is 1520012191. The next prime is 1520012227. The reversal of 1520012205 is 5022100251.

It can be written as a sum of positive squares in 4 ways, for example, as 19766916 + 1500245289 = 4446^2 + 38733^2 .

It is not a de Polignac number, because 1520012205 - 2⁵ = 1520012173 is a prime.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 228072 + ... + 234641.

It is an arithmetic number, because the mean of its divisors is an integer number (111282717).

Almost surely, 2^1520012205 is an apocalyptic number.

1520012205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1520012205 is a deficient number, since it is larger than the sum of its proper divisors (1150773003).

1520012205 is a wasteful number, since it uses less digits than its factorization.

1520012205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462797 (or 462794 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1520012205 is about 38987.3339047440. Note that the first 3 decimals coincide. The cubic root of 1520012205 is about 1149.7824932057.

Adding to 1520012205 its reverse (5022100251), we get a palindrome (6542112456).

The spelling of 1520012205 in words is "one billion, five hundred twenty million, twelve thousand, two hundred five".