13142720 has 56 divisors (see below), whose sum is σ = 31815024. Its totient is φ = 5170176.

The previous prime is 13142711. The next prime is 13142743. The reversal of 13142720 is 2724131.

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 = 13142692 and 13142701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21134 + ... + 21746.

Almost surely, 2^13142720 is an apocalyptic number.

13142720 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 13142720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15907512).

13142720 is an abundant number, since it is smaller than the sum of its proper divisors (18672304).

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

13142720 is an equidigital number, since it uses as much as digits as its factorization.

13142720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 687 counting only the distinct ones).

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

The square root of 13142720 is about 3625.2889540008. The cubic root of 13142720 is about 235.9908068812.

Adding to 13142720 its reverse (2724131), we get a palindrome (15866851).

The spelling of 13142720 in words is "thirteen million, one hundred forty-two thousand, seven hundred twenty".