1205311230 has 48 divisors (see below), whose sum is σ = 3150261504. Its totient is φ = 319728960.

The previous prime is 1205311201. The next prime is 1205311231. The reversal of 1205311230 is 321135021.

1205311230 is a `hidden beast` number, since 12 + 0 + 531 + 123 + 0 = 666.

It is a super-2 number, since 2×1205311230² = 2905550322328225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205311231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17869 + ... + 52248.

It is an arithmetic number, because the mean of its divisors is an integer number (65630448).

Almost surely, 2^1205311230 is an apocalyptic number.

1205311230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1205311230 is an abundant number, since it is smaller than the sum of its proper divisors (1944950274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205311230 is a wasteful number, since it uses less digits than its factorization.

1205311230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70321 (or 70318 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1205311230 is about 34717.5925144587. The cubic root of 1205311230 is about 1064.2240463002.

Adding to 1205311230 its reverse (321135021), we get a palindrome (1526446251).

The spelling of 1205311230 in words is "one billion, two hundred five million, three hundred eleven thousand, two hundred thirty".