13421256 has 16 divisors (see below), whose sum is σ = 33553200. Its totient is φ = 4473744.

The previous prime is 13421251. The next prime is 13421267. The reversal of 13421256 is 65212431.

It is a super-2 number, since 2×13421256² = 360260225235072, which contains 22 as substring.

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: 559219 = 13421256 / (1 + 3 + 4 + 2 + 1 + 2 + 5 + 6).

It is not an unprimeable number, because it can be changed into a prime (13421251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279586 + ... + 279633.

It is an arithmetic number, because the mean of its divisors is an integer number (2097075).

Almost surely, 2^13421256 is an apocalyptic number.

It is an amenable number.

13421256 is an abundant number, since it is smaller than the sum of its proper divisors (20131944).

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

13421256 is a wasteful number, since it uses less digits than its factorization.

13421256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559228 (or 559224 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 13421256 is about 3663.5032414344. The cubic root of 13421256 is about 237.6462980441.

Adding to 13421256 its reverse (65212431), we get a palindrome (78633687).

The spelling of 13421256 in words is "thirteen million, four hundred twenty-one thousand, two hundred fifty-six".