13420256 has 12 divisors (see below), whose sum is σ = 26421192. Its totient is φ = 6710112.

The previous prime is 13420237. The next prime is 13420271. The reversal of 13420256 is 65202431.

It is a super-2 number, since 2×13420256² = 360206542211072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 209660 + ... + 209723.

It is an arithmetic number, because the mean of its divisors is an integer number (2201766).

Almost surely, 2^13420256 is an apocalyptic number.

13420256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13420256 is a deficient number, since it is larger than the sum of its proper divisors (13000936).

13420256 is an equidigital number, since it uses as much as digits as its factorization.

13420256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419393 (or 419385 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 13420256 is about 3663.3667575060. The cubic root of 13420256 is about 237.6403956606.

Adding to 13420256 its reverse (65202431), we get a palindrome (78622687).

The spelling of 13420256 in words is "thirteen million, four hundred twenty thousand, two hundred fifty-six".