13203425 has 6 divisors (see below), whose sum is σ = 16372278. Its totient is φ = 10562720.

The previous prime is 13203419. The next prime is 13203431. The reversal of 13203425 is 52430231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13203419) and next prime (13203431).

It can be written as a sum of positive squares in 3 ways, for example, as 185761 + 13017664 = 431^2 + 3608^2 .

It is not a de Polignac number, because 13203425 - 2⁴ = 13203409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13203397 and 13203406.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 264044 + ... + 264093.

It is an arithmetic number, because the mean of its divisors is an integer number (2728713).

Almost surely, 2^13203425 is an apocalyptic number.

It is an amenable number.

13203425 is a deficient number, since it is larger than the sum of its proper divisors (3168853).

13203425 is an equidigital number, since it uses as much as digits as its factorization.

13203425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528147 (or 528142 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 13203425 is about 3633.6517444576. The cubic root of 13203425 is about 236.3535887561.

Adding to 13203425 its reverse (52430231), we get a palindrome (65633656).

The spelling of 13203425 in words is "thirteen million, two hundred three thousand, four hundred twenty-five".