12142720 has 32 divisors (see below), whose sum is σ = 29030220. Its totient is φ = 4856832.

The previous prime is 12142717. The next prime is 12142733. The reversal of 12142720 is 2724121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11888704 + 254016 = 3448^2 + 504^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8847 + ... + 10126.

Almost surely, 2^12142720 is an apocalyptic number.

12142720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12142720 is an abundant number, since it is smaller than the sum of its proper divisors (16887500).

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

12142720 is an equidigital number, since it uses as much as digits as its factorization.

12142720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18992 (or 18980 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12142720 is about 3484.6405840488. The cubic root of 12142720 is about 229.8469050493.

Adding to 12142720 its reverse (2724121), we get a palindrome (14866841).

The spelling of 12142720 in words is "twelve million, one hundred forty-two thousand, seven hundred twenty".