13421872 has 20 divisors (see below), whose sum is σ = 26062816. Its totient is φ = 6696000.

The previous prime is 13421869. The next prime is 13421873. The reversal of 13421872 is 27812431.

It is a self number, because there is not a number n which added to its sum of digits gives 13421872.

It is not an unprimeable number, because it can be changed into a prime (13421873) 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, 11458 + ... + 12574.

Almost surely, 2^13421872 is an apocalyptic number.

It is an amenable number.

13421872 is a deficient number, since it is larger than the sum of its proper divisors (12640944).

13421872 is a wasteful number, since it uses less digits than its factorization.

13421872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876 (or 1870 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 13421872 is about 3663.5873130035. The cubic root of 13421872 is about 237.6499337664.

The spelling of 13421872 in words is "thirteen million, four hundred twenty-one thousand, eight hundred seventy-two".