12428905225 has 27 divisors (see below), whose sum is σ = 16948651111. Its totient is φ = 9034744400.

The previous prime is 12428905217. The next prime is 12428905273. The reversal of 12428905225 is 52250982421.

The square root of 12428905225 is 111485.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4474405881 + 7954499344 = 66891^2 + 89188^2 .

It is not a de Polignac number, because 12428905225 - 2³ = 12428905217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6130662 + ... + 6132688.

Almost surely, 2^12428905225 is an apocalyptic number.

12428905225 is the 111485-th square number.

12428905225 is the 55743-rd centered octagonal number.

It is an amenable number.

12428905225 is a deficient number, since it is larger than the sum of its proper divisors (4519745886).

12428905225 is an frugal number, since it uses more digits than its factorization.

12428905225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086 (or 2043 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 12428905225 in words is "twelve billion, four hundred twenty-eight million, nine hundred five thousand, two hundred twenty-five".