13140720 has 60 divisors (see below), whose sum is σ = 44133336. Its totient is φ = 3504000.

The previous prime is 13140719. The next prime is 13140727. The reversal of 13140720 is 2704131.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13140693 and 13140702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8406 + ... + 9845.

Almost surely, 2^13140720 is an apocalyptic number.

13140720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13140720 is an abundant number, since it is smaller than the sum of its proper divisors (30992616).

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

13140720 is a wasteful number, since it uses less digits than its factorization.

13140720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18270 (or 18261 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 13140720 is about 3625.0131034246. The cubic root of 13140720 is about 235.9788356008.

Adding to 13140720 its reverse (2704131), we get a palindrome (15844851).

The spelling of 13140720 in words is "thirteen million, one hundred forty thousand, seven hundred twenty".