1203520005 has 16 divisors (see below), whose sum is σ = 2139591360. Its totient is φ = 641877264.

The previous prime is 1203520001. The next prime is 1203520007. The reversal of 1203520005 is 5000253021.

It is a happy number.

It is not a de Polignac number, because 1203520005 - 2² = 1203520001 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1203520005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203520001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4457347 + ... + 4457616.

It is an arithmetic number, because the mean of its divisors is an integer number (133724460).

Almost surely, 2^1203520005 is an apocalyptic number.

1203520005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1203520005 is a deficient number, since it is larger than the sum of its proper divisors (936071355).

1203520005 is an equidigital number, since it uses as much as digits as its factorization.

1203520005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8914977 (or 8914971 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1203520005 is about 34691.7858433376. The cubic root of 1203520005 is about 1063.6966002883.

Adding to 1203520005 its reverse (5000253021), we get a palindrome (6203773026).

The spelling of 1203520005 in words is "one billion, two hundred three million, five hundred twenty thousand, five".