13256403 has 4 divisors (see below), whose sum is σ = 17675208. Its totient is φ = 8837600.

The previous prime is 13256401. The next prime is 13256417. The reversal of 13256403 is 30465231.

It is a happy number.

13256403 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30465231 = 3 ⋅10155077.

It is a cyclic number.

It is not a de Polignac number, because 13256403 - 2¹ = 13256401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13256401) 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, 2209398 + ... + 2209403.

It is an arithmetic number, because the mean of its divisors is an integer number (4418802).

Almost surely, 2^13256403 is an apocalyptic number.

13256403 is a deficient number, since it is larger than the sum of its proper divisors (4418805).

13256403 is an equidigital number, since it uses as much as digits as its factorization.

13256403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418804.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 13256403 is about 3640.9343581010. The cubic root of 13256403 is about 236.6692853862.

The spelling of 13256403 in words is "thirteen million, two hundred fifty-six thousand, four hundred three".