13421776 has 20 divisors (see below), whose sum is σ = 26082532. Its totient is φ = 6690816.

The previous prime is 13421767. The next prime is 13421783. The reversal of 13421776 is 67712431.

It can be written as a sum of positive squares in 2 ways, for example, as 3027600 + 10394176 = 1740^2 + 3224^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 5296 + ... + 7408.

Almost surely, 2^13421776 is an apocalyptic number.

13421776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13421776 is a deficient number, since it is larger than the sum of its proper divisors (12660756).

13421776 is a wasteful number, since it uses less digits than its factorization.

13421776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518 (or 2512 counting only the distinct ones).

The product of its digits is 7056, while the sum is 31.

The square root of 13421776 is about 3663.5742110677. The cubic root of 13421776 is about 237.6493671676.

The spelling of 13421776 in words is "thirteen million, four hundred twenty-one thousand, seven hundred seventy-six".