12451728 has 20 divisors (see below), whose sum is σ = 32167088. Its totient is φ = 4150560.

The previous prime is 12451727. The next prime is 12451787. The reversal of 12451728 is 82715421.

It is a junction number, because it is equal to n+sod(n) for n = 12451695 and 12451704.

It is not an unprimeable number, because it can be changed into a prime (12451727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129658 + ... + 129753.

Almost surely, 2^12451728 is an apocalyptic number.

It is an amenable number.

12451728 is an abundant number, since it is smaller than the sum of its proper divisors (19715360).

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

12451728 is a wasteful number, since it uses less digits than its factorization.

12451728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259422 (or 259416 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 12451728 is about 3528.7006107064. The cubic root of 12451728 is about 231.7803112580.

The spelling of 12451728 in words is "twelve million, four hundred fifty-one thousand, seven hundred twenty-eight".