1203445345 has 4 divisors (see below), whose sum is σ = 1444134420. Its totient is φ = 962756272.

The previous prime is 1203445337. The next prime is 1203445363. The reversal of 1203445345 is 5435443021.

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 302725201 + 900720144 = 17399^2 + 30012^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203445345 - 2³ = 1203445337 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120344530 + ... + 120344539.

It is an arithmetic number, because the mean of its divisors is an integer number (361033605).

Almost surely, 2^1203445345 is an apocalyptic number.

It is an amenable number.

1203445345 is a deficient number, since it is larger than the sum of its proper divisors (240689075).

1203445345 is an equidigital number, since it uses as much as digits as its factorization.

1203445345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240689074.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 1203445345 is about 34690.7097794208. The cubic root of 1203445345 is about 1063.6746044677.

Adding to 1203445345 its reverse (5435443021), we get a palindrome (6638888366).

The spelling of 1203445345 in words is "one billion, two hundred three million, four hundred forty-five thousand, three hundred forty-five".