1205133255 has 32 divisors (see below), whose sum is σ = 2152120320. Its totient is φ = 639839520.

The previous prime is 1205133169. The next prime is 1205133257. The reversal of 1205133255 is 5523315021.

It is a happy number.

1205133255 is a `hidden beast` number, since 120 + 513 + 3 + 25 + 5 = 666.

It is not a de Polignac number, because 1205133255 - 2⁹ = 1205132743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205133257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10090 + ... + 50120.

It is an arithmetic number, because the mean of its divisors is an integer number (67253760).

Almost surely, 2^1205133255 is an apocalyptic number.

1205133255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1205133255 is a deficient number, since it is larger than the sum of its proper divisors (946987065).

1205133255 is a wasteful number, since it uses less digits than its factorization.

1205133255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40268 (or 40262 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1205133255 is about 34715.0292380692. The cubic root of 1205133255 is about 1064.1716629840.

Adding to 1205133255 its reverse (5523315021), we get a palindrome (6728448276).

The spelling of 1205133255 in words is "one billion, two hundred five million, one hundred thirty-three thousand, two hundred fifty-five".