1025530909225 has 27 divisors (see below), whose sum is σ = 1277568723951. Its totient is φ = 816629184000.

The previous prime is 1025530909219. The next prime is 1025530909301. The reversal of 1025530909225 is 5229090355201.

The square root of 1025530909225 is 1012685.

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

It can be written as a sum of positive squares in 13 ways, for example, as 519605980569 + 505924928656 = 720837^2 + 711284^2 .

It is not a de Polignac number, because 1025530909225 - 2⁷ = 1025530909097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1706373925 + ... + 1706374525.

Almost surely, 2^{1025530909225} is an apocalyptic number.

1025530909225 is the 1012685-th square number.

1025530909225 is the 506343-rd centered octagonal number.

It is an amenable number.

1025530909225 is a deficient number, since it is larger than the sum of its proper divisors (252037814726).

1025530909225 is an frugal number, since it uses more digits than its factorization.

1025530909225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 43.

The spelling of 1025530909225 in words is "one trillion, twenty-five billion, five hundred thirty million, nine hundred nine thousand, two hundred twenty-five".