1203355243 has 4 divisors (see below), whose sum is σ = 1207637928. Its totient is φ = 1199072560.

The previous prime is 1203355187. The next prime is 1203355259. The reversal of 1203355243 is 3425533021.

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 1203355243 - 2⁹ = 1203354731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203355273) 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, 2140921 + ... + 2141482.

It is an arithmetic number, because the mean of its divisors is an integer number (301909482).

Almost surely, 2^1203355243 is an apocalyptic number.

1203355243 is a deficient number, since it is larger than the sum of its proper divisors (4282685).

1203355243 is an equidigital number, since it uses as much as digits as its factorization.

1203355243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282684.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 1203355243 is about 34689.4111077141. The cubic root of 1203355243 is about 1063.6480580188.

Adding to 1203355243 its reverse (3425533021), we get a palindrome (4628888264).

It can be divided in two parts, 12033 and 55243, that added together give a palindrome (67276).

The spelling of 1203355243 in words is "one billion, two hundred three million, three hundred fifty-five thousand, two hundred forty-three".