1021224425 has 24 divisors (see below), whose sum is σ = 1443954456. Its totient is φ = 709770240.

The previous prime is 1021224397. The next prime is 1021224431. The reversal of 1021224425 is 5244221201.

It can be written as a sum of positive squares in 12 ways, for example, as 643738384 + 377486041 = 25372^2 + 19429^2 .

It is not a de Polignac number, because 1021224425 - 2⁶ = 1021224361 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 1021224425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86894 + ... + 97943.

It is an arithmetic number, because the mean of its divisors is an integer number (60164769).

Almost surely, 2^1021224425 is an apocalyptic number.

It is an amenable number.

1021224425 is a deficient number, since it is larger than the sum of its proper divisors (422730031).

1021224425 is a wasteful number, since it uses less digits than its factorization.

1021224425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184877 (or 184872 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1021224425 is about 31956.6022130013. The cubic root of 1021224425 is about 1007.0253373885.

Adding to 1021224425 its reverse (5244221201), we get a palindrome (6265445626).

The spelling of 1021224425 in words is "one billion, twenty-one million, two hundred twenty-four thousand, four hundred twenty-five".