13203145 has 16 divisors (see below), whose sum is σ = 16351632. Its totient is φ = 10229760.

The previous prime is 13203139. The next prime is 13203167. The reversal of 13203145 is 54130231.

It can be written as a sum of positive squares in 8 ways, for example, as 1016064 + 12187081 = 1008^2 + 3491^2 .

It is not a de Polignac number, because 13203145 - 2⁷ = 13203017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21969 + ... + 22561.

It is an arithmetic number, because the mean of its divisors is an integer number (1021977).

Almost surely, 2^13203145 is an apocalyptic number.

It is an amenable number.

13203145 is a deficient number, since it is larger than the sum of its proper divisors (3148487).

13203145 is an equidigital number, since it uses as much as digits as its factorization.

13203145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 13203145 is about 3633.6132155198. The cubic root of 13203145 is about 236.3519179909.

Adding to 13203145 its reverse (54130231), we get a palindrome (67333376).

It can be divided in two parts, 1320 and 3145, that added together give a triangular number (4465 = T₉₄).

The spelling of 13203145 in words is "thirteen million, two hundred three thousand, one hundred forty-five".