1203431345 has 4 divisors (see below), whose sum is σ = 1444117620. Its totient is φ = 962745072.

The previous prime is 1203431321. The next prime is 1203431351. The reversal of 1203431345 is 5431343021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 342361009 + 861070336 = 18503^2 + 29344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203431345 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120343130 + ... + 120343139.

It is an arithmetic number, because the mean of its divisors is an integer number (361029405).

Almost surely, 2^1203431345 is an apocalyptic number.

It is an amenable number.

1203431345 is a deficient number, since it is larger than the sum of its proper divisors (240686275).

1203431345 is an equidigital number, since it uses as much as digits as its factorization.

1203431345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240686274.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1203431345 is about 34690.5079957040. The cubic root of 1203431345 is about 1063.6704797818.

Adding to 1203431345 its reverse (5431343021), we get a palindrome (6634774366).

The spelling of 1203431345 in words is "one billion, two hundred three million, four hundred thirty-one thousand, three hundred forty-five".