13421056 has 40 divisors (see below), whose sum is σ = 29265984. Its totient is φ = 6097920.

The previous prime is 13421039. The next prime is 13421071. The reversal of 13421056 is 65012431.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4441 + ... + 6823.

Almost surely, 2^13421056 is an apocalyptic number.

13421056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13421056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14632992).

13421056 is an abundant number, since it is smaller than the sum of its proper divisors (15844928).

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

13421056 is an equidigital number, since it uses as much as digits as its factorization.

13421056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 13421056 is about 3663.4759450555. The cubic root of 13421056 is about 237.6451175908.

Adding to 13421056 its reverse (65012431), we get a palindrome (78433487).

The spelling of 13421056 in words is "thirteen million, four hundred twenty-one thousand, fifty-six".