1205134263 has 12 divisors (see below), whose sum is σ = 1741409488. Its totient is φ = 803118240.

The previous prime is 1205134253. The next prime is 1205134277. The reversal of 1205134263 is 3624315021.

1205134263 is a `hidden beast` number, since 120 + 513 + 4 + 26 + 3 = 666.

It is not a de Polignac number, because 1205134263 - 2⁴ = 1205134247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205134253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1131 + ... + 49107.

Almost surely, 2^1205134263 is an apocalyptic number.

1205134263 is a deficient number, since it is larger than the sum of its proper divisors (536275225).

1205134263 is a wasteful number, since it uses less digits than its factorization.

1205134263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50774 (or 50771 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1205134263 is about 34715.0437562737. The cubic root of 1205134263 is about 1064.1719596828.

Adding to 1205134263 its reverse (3624315021), we get a palindrome (4829449284).

The spelling of 1205134263 in words is "one billion, two hundred five million, one hundred thirty-four thousand, two hundred sixty-three".