1428445225 has 12 divisors (see below), whose sum is σ = 1773820620. Its totient is φ = 1141112000.

The previous prime is 1428445219. The next prime is 1428445229. The reversal of 1428445225 is 5225448241.

It can be written as a sum of positive squares in 6 ways, for example, as 70375321 + 1358069904 = 8389^2 + 36852^2 .

It is not a de Polignac number, because 1428445225 - 2³ = 1428445217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1428445229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23230 + ... + 58279.

It is an arithmetic number, because the mean of its divisors is an integer number (147818385).

Almost surely, 2^1428445225 is an apocalyptic number.

It is an amenable number.

1428445225 is a deficient number, since it is larger than the sum of its proper divisors (345375395).

1428445225 is an equidigital number, since it uses as much as digits as its factorization.

1428445225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82220 (or 82215 counting only the distinct ones).

The product of its digits is 102400, while the sum is 37.

The square root of 1428445225 is about 37794.7777477259. Note that the first 4 decimals coincide. The cubic root of 1428445225 is about 1126.2147142825.

The spelling of 1428445225 in words is "one billion, four hundred twenty-eight million, four hundred forty-five thousand, two hundred twenty-five".