1087205265 has 12 divisors (see below), whose sum is σ = 1884489204. Its totient is φ = 579842784.

The previous prime is 1087205263. The next prime is 1087205291. The reversal of 1087205265 is 5625027801.

It is a happy number.

1087205265 is a `hidden beast` number, since 108 + 7 + 20 + 526 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 440622081 + 646583184 = 20991^2 + 25428^2 .

It is not a de Polignac number, because 1087205265 - 2¹ = 1087205263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1087205263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12080014 + ... + 12080103.

It is an arithmetic number, because the mean of its divisors is an integer number (157040767).

Almost surely, 2^1087205265 is an apocalyptic number.

1087205265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1087205265 is a deficient number, since it is larger than the sum of its proper divisors (797283939).

1087205265 is a wasteful number, since it uses less digits than its factorization.

1087205265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24160128 (or 24160125 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 1087205265 is about 32972.7958323221. The cubic root of 1087205265 is about 1028.2621478766.

The spelling of 1087205265 in words is "one billion, eighty-seven million, two hundred five thousand, two hundred sixty-five".