12051720 has 64 divisors (see below), whose sum is σ = 40176000. Its totient is φ = 3213504.

The previous prime is 12051679. The next prime is 12051727. The reversal of 12051720 is 2715021.

12051720 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 = 12051693 and 12051702.

It is not an unprimeable number, because it can be changed into a prime (12051727) 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, 4500 + ... + 6659.

It is an arithmetic number, because the mean of its divisors is an integer number (627750).

Almost surely, 2^12051720 is an apocalyptic number.

12051720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12051720 is an abundant number, since it is smaller than the sum of its proper divisors (28124280).

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

12051720 is a wasteful number, since it uses less digits than its factorization.

12051720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11179 (or 11169 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 12051720 is about 3471.5587277187. The cubic root of 12051720 is about 229.2712916573.

Adding to 12051720 its reverse (2715021), we get a palindrome (14766741).

The spelling of 12051720 in words is "twelve million, fifty-one thousand, seven hundred twenty".