12611720 has 32 divisors (see below), whose sum is σ = 30957120. Its totient is φ = 4585920.

The previous prime is 12611713. The next prime is 12611747. The reversal of 12611720 is 2711621.

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 = 12611692 and 12611701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13892 + ... + 14771.

It is an arithmetic number, because the mean of its divisors is an integer number (967410).

Almost surely, 2^12611720 is an apocalyptic number.

12611720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12611720 is an abundant number, since it is smaller than the sum of its proper divisors (18345400).

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

12611720 is a wasteful number, since it uses less digits than its factorization.

12611720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28685 (or 28681 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 12611720 is about 3551.2983541235. The cubic root of 12611720 is about 232.7688030687.

Subtracting from 12611720 its reverse (2711621), we obtain a palindrome (9900099).

It can be divided in two parts, 12611 and 720, that added together give a palindrome (13331).

The spelling of 12611720 in words is "twelve million, six hundred eleven thousand, seven hundred twenty".