1205550103 has 4 divisors (see below), whose sum is σ = 1244438848. Its totient is φ = 1166661360.

The previous prime is 1205550089. The next prime is 1205550113. The reversal of 1205550103 is 3010555021.

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 1205550103 - 2²⁹ = 668679191 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 (1205550113) 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, 19444326 + ... + 19444387.

It is an arithmetic number, because the mean of its divisors is an integer number (311109712).

Almost surely, 2^1205550103 is an apocalyptic number.

1205550103 is a deficient number, since it is larger than the sum of its proper divisors (38888745).

1205550103 is an equidigital number, since it uses as much as digits as its factorization.

1205550103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38888744.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 1205550103 is about 34721.0325739313. The cubic root of 1205550103 is about 1064.2943455978.

The spelling of 1205550103 in words is "one billion, two hundred five million, five hundred fifty thousand, one hundred three".