13206720 has 56 divisors (see below), whose sum is σ = 41934384. Its totient is φ = 3521536.

The previous prime is 13206709. The next prime is 13206727. The reversal of 13206720 is 2760231.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13206727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5919 + ... + 7838.

Almost surely, 2^13206720 is an apocalyptic number.

13206720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13206720 is an abundant number, since it is smaller than the sum of its proper divisors (28727664).

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

13206720 is a wasteful number, since it uses less digits than its factorization.

13206720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13777 (or 13767 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 13206720 is about 3634.1051168066. The cubic root of 13206720 is about 236.3732483091.

Adding to 13206720 its reverse (2760231), we get a palindrome (15966951).

The spelling of 13206720 in words is "thirteen million, two hundred six thousand, seven hundred twenty".