1019844225 has 27 divisors (see below), whose sum is σ = 1827512713. Its totient is φ = 543661440.

The previous prime is 1019844223. The next prime is 1019844227. The reversal of 1019844225 is 5224489101.

The square root of 1019844225 is 31935.

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

1019844225 is a `hidden beast` number, since 1 + 0 + 198 + 442 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (1019844223) and next prime (1019844227).

It can be written as a sum of positive squares in 4 ways, for example, as 154778481 + 865065744 = 12441^2 + 29412^2 .

It is not a de Polignac number, because 1019844225 - 2¹ = 1019844223 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1019844225.

It is not an unprimeable number, because it can be changed into a prime (1019844223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 477961 + ... + 480089.

Almost surely, 2^1019844225 is an apocalyptic number.

1019844225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1019844225 is the 31935-th square number.

1019844225 is the 15968-th centered octagonal number.

It is an amenable number.

1019844225 is a deficient number, since it is larger than the sum of its proper divisors (807668488).

1019844225 is an frugal number, since it uses more digits than its factorization.

1019844225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274 (or 2137 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The cubic root of 1019844225 is about 1006.5714629471.

Multiplying 1019844225 by its sum of digits (36), we get a square (36714392100 = 191610²).

The spelling of 1019844225 in words is "one billion, nineteen million, eight hundred forty-four thousand, two hundred twenty-five".