13001720 has 16 divisors (see below), whose sum is σ = 29253960. Its totient is φ = 5200672.

The previous prime is 13001717. The next prime is 13001731. The reversal of 13001720 is 2710031.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 13001695 and 13001704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162482 + ... + 162561.

Almost surely, 2^13001720 is an apocalyptic number.

13001720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13001720 is an abundant number, since it is smaller than the sum of its proper divisors (16252240).

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

13001720 is a wasteful number, since it uses less digits than its factorization.

13001720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325054 (or 325050 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 13001720 is about 3605.7897886593. The cubic root of 13001720 is about 235.1438383036.

Adding to 13001720 its reverse (2710031), we get a palindrome (15711751).

It can be divided in two parts, 130017 and 20, that multiplied together give a triangular number (2600340 = T₂₂₈₀).

The spelling of 13001720 in words is "thirteen million, one thousand, seven hundred twenty".