1161312 has 24 divisors (see below), whose sum is σ = 3048696. Its totient is φ = 387072.

The previous prime is 1161289. The next prime is 1161313. The reversal of 1161312 is 2131611.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1161312² = 2697291122688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1161291 and 1161300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5953 + ... + 6144.

It is an arithmetic number, because the mean of its divisors is an integer number (127029).

2^1161312 is an apocalyptic number.

1161312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1161312 is an abundant number, since it is smaller than the sum of its proper divisors (1887384).

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

1161312 is a wasteful number, since it uses less digits than its factorization.

1161312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12110 (or 12102 counting only the distinct ones).

The product of its digits is 36, while the sum is 15.

The square root of 1161312 is about 1077.6418700106. The cubic root of 1161312 is about 105.1113557849. Note that the first 3 decimals are identical.

Adding to 1161312 its reverse (2131611), we get a palindrome (3292923).

Subtracting 1161312 from its reverse (2131611), we obtain a cube (970299 = 99³).

The spelling of 1161312 in words is "one million, one hundred sixty-one thousand, three hundred twelve".