13403256 has 16 divisors (see below), whose sum is σ = 33508200. Its totient is φ = 4467744.

The previous prime is 13403251. The next prime is 13403267. The reversal of 13403256 is 65230431.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 558469 = 13403256 / (1 + 3 + 4 + 0 + 3 + 2 + 5 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13403251) 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, 279211 + ... + 279258.

Almost surely, 2^13403256 is an apocalyptic number.

It is an amenable number.

13403256 is an abundant number, since it is smaller than the sum of its proper divisors (20104944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13403256 is a wasteful number, since it uses less digits than its factorization.

13403256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558478 (or 558474 counting only the distinct ones).

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

The square root of 13403256 is about 3661.0457522407. The cubic root of 13403256 is about 237.5400102492.

Adding to 13403256 its reverse (65230431), we get a palindrome (78633687).

The spelling of 13403256 in words is "thirteen million, four hundred three thousand, two hundred fifty-six".