1025216361 has 27 divisors (see below), whose sum is σ = 1605499077. Its totient is φ = 630133920.

The previous prime is 1025216333. The next prime is 1025216393. The reversal of 1025216361 is 1636125201.

The square root of 1025216361 is 32019.

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

1025216361 is a `hidden beast` number, since 1 + 0 + 2 + 5 + 21 + 636 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 352125225 + 673091136 = 18765^2 + 25944^2 .

It is not a de Polignac number, because 1025216361 - 2¹¹ = 1025214313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025215361) 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, 1248331 + ... + 1249151.

Almost surely, 2^1025216361 is an apocalyptic number.

1025216361 is the 32019-th square number.

1025216361 is the 16010-th centered octagonal number.

It is an amenable number.

1025216361 is a deficient number, since it is larger than the sum of its proper divisors (580282716).

1025216361 is an frugal number, since it uses more digits than its factorization.

1025216361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The cubic root of 1025216361 is about 1008.3357754435.

The spelling of 1025216361 in words is "one billion, twenty-five million, two hundred sixteen thousand, three hundred sixty-one".