1161306212 has 36 divisors (see below), whose sum is σ = 2236846668. Its totient is φ = 527155200.

The previous prime is 1161306191. The next prime is 1161306217. The reversal of 1161306212 is 2126031611.

It can be written as a sum of positive squares in 2 ways, for example, as 688852516 + 472453696 = 26246^2 + 21736^2 .

It is a super-3 number, since 3×1161306212³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1161306217) 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, 557012 + ... + 559092.

Almost surely, 2^1161306212 is an apocalyptic number.

It is an amenable number.

1161306212 is a deficient number, since it is larger than the sum of its proper divisors (1075540456).

1161306212 is a wasteful number, since it uses less digits than its factorization.

1161306212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260 (or 3247 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1161306212 is about 34077.9431891069. The cubic root of 1161306212 is about 1051.1118115894. Note that the first 3 decimals are identical.

Adding to 1161306212 its reverse (2126031611), we get a palindrome (3287337823).

The spelling of 1161306212 in words is "one billion, one hundred sixty-one million, three hundred six thousand, two hundred twelve".