13015720 has 32 divisors (see below), whose sum is σ = 29704320. Its totient is φ = 5131840.

The previous prime is 13015669. The next prime is 13015721. The reversal of 13015720 is 2751031.

It is not an unprimeable number, because it can be changed into a prime (13015721) 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 7 ways as a sum of consecutive naturals, for example, 549 + ... + 5131.

It is an arithmetic number, because the mean of its divisors is an integer number (928260).

Almost surely, 2^13015720 is an apocalyptic number.

13015720 is a gapful number since it is divisible by the number (10) 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 13015720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14852160).

13015720 is an abundant number, since it is smaller than the sum of its proper divisors (16688600).

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

13015720 is a wasteful number, since it uses less digits than its factorization.

13015720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665 (or 4661 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 13015720 is about 3607.7305886111. The cubic root of 13015720 is about 235.2282074705.

Adding to 13015720 its reverse (2751031), we get a palindrome (15766751).

It can be divided in two parts, 1301 and 5720, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 13015720 in words is "thirteen million, fifteen thousand, seven hundred twenty".