1191230359225 has 9 divisors (see below), whose sum is σ = 1477132412367. Its totient is φ = 952979921640.

The previous prime is 1191230359213. The next prime is 1191230359229. The reversal of 1191230359225 is 5229530321911.

The square root of 1191230359225 is 1091435.

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

It can be written as a sum of positive squares in only one way, i.e., 428842929321 + 762387429904 = 654861^2 + 873148^2 .

It is not a de Polignac number, because 1191230359225 - 2²⁷ = 1191096141497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1191230359229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5348032 + ... + 5566318.

Almost surely, 2^{1191230359225} is an apocalyptic number.

1191230359225 is the 1091435-th square number.

1191230359225 is the 545718-th centered octagonal number.

It is an amenable number.

1191230359225 is a deficient number, since it is larger than the sum of its proper divisors (285902053142).

1191230359225 is an frugal number, since it uses more digits than its factorization.

1191230359225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436584 (or 218292 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 1191230359225 in words is "one trillion, one hundred ninety-one billion, two hundred thirty million, three hundred fifty-nine thousand, two hundred twenty-five".