12142728 has 48 divisors (see below), whose sum is σ = 35419020. Its totient is φ = 3735936.

The previous prime is 12142717. The next prime is 12142733. The reversal of 12142728 is 82724121.

It can be written as a sum of positive squares in 2 ways, for example, as 8749764 + 3392964 = 2958^2 + 1842^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5551 + ... + 7422.

Almost surely, 2^12142728 is an apocalyptic number.

12142728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12142728 is an abundant number, since it is smaller than the sum of its proper divisors (23276292).

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

12142728 is a wasteful number, since it uses less digits than its factorization.

12142728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12998 (or 12991 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 12142728 is about 3484.6417319432. The cubic root of 12142728 is about 229.8469555260.

Adding to 12142728 its reverse (82724121), we get a palindrome (94866849).

It can be divided in two parts, 121 and 42728, that added together give a square (42849 = 207²).

The spelling of 12142728 in words is "twelve million, one hundred forty-two thousand, seven hundred twenty-eight".