13124720 has 80 divisors (see below), whose sum is σ = 36426240. Its totient is φ = 4300032.

The previous prime is 13124717. The next prime is 13124723. The reversal of 13124720 is 2742131.

It is an interprime number because it is at equal distance from previous prime (13124717) and next prime (13124723).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13124692 and 13124701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13124723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12371 + ... + 13389.

It is an arithmetic number, because the mean of its divisors is an integer number (455328).

Almost surely, 2^13124720 is an apocalyptic number.

13124720 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 13124720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18213120).

13124720 is an abundant number, since it is smaller than the sum of its proper divisors (23301520).

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

13124720 is a wasteful number, since it uses less digits than its factorization.

13124720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 13124720 is about 3622.8055426699. The cubic root of 13124720 is about 235.8830216016.

Adding to 13124720 its reverse (2742131), we get a palindrome (15866851).

The spelling of 13124720 in words is "thirteen million, one hundred twenty-four thousand, seven hundred twenty".