1206520103 has 4 divisors (see below), whose sum is σ = 1211327208. Its totient is φ = 1201713000.

The previous prime is 1206520067. The next prime is 1206520109. The reversal of 1206520103 is 3010256021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1206520103 - 2¹² = 1206516007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206520109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2403176 + ... + 2403677.

It is an arithmetic number, because the mean of its divisors is an integer number (302831802).

Almost surely, 2^1206520103 is an apocalyptic number.

1206520103 is a deficient number, since it is larger than the sum of its proper divisors (4807105).

1206520103 is an equidigital number, since it uses as much as digits as its factorization.

1206520103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4807104.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1206520103 is about 34734.9982438462. The cubic root of 1206520103 is about 1064.5797170510.

Adding to 1206520103 its reverse (3010256021), we get a palindrome (4216776124).

The spelling of 1206520103 in words is "one billion, two hundred six million, five hundred twenty thousand, one hundred three".