1022005625 has 20 divisors (see below), whose sum is σ = 1301236596. Its totient is φ = 802152000.

The previous prime is 1022005619. The next prime is 1022005637. The reversal of 1022005625 is 5265002201.

It can be written as a sum of positive squares in 10 ways, for example, as 874917241 + 147088384 = 29579^2 + 12128^2 .

It is not a de Polignac number, because 1022005625 - 2¹⁶ = 1021940089 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 1022005625.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17699 + ... + 48551.

Almost surely, 2^1022005625 is an apocalyptic number.

It is an amenable number.

1022005625 is a deficient number, since it is larger than the sum of its proper divisors (279230971).

1022005625 is an frugal number, since it uses more digits than its factorization.

1022005625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30926 (or 30911 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1022005625 is about 31968.8227027521. The cubic root of 1022005625 is about 1007.2820513434.

Adding to 1022005625 its reverse (5265002201), we get a palindrome (6287007826).

The spelling of 1022005625 in words is "one billion, twenty-two million, five thousand, six hundred twenty-five".