1161323252 has 6 divisors (see below), whose sum is σ = 2032315698. Its totient is φ = 580661624.

The previous prime is 1161323243. The next prime is 1161323257. The reversal of 1161323252 is 2523231611.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1017227236 + 144096016 = 31894^2 + 12004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161323257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145165403 + ... + 145165410.

It is an arithmetic number, because the mean of its divisors is an integer number (338719283).

Almost surely, 2^1161323252 is an apocalyptic number.

It is an amenable number.

1161323252 is a deficient number, since it is larger than the sum of its proper divisors (870992446).

1161323252 is a wasteful number, since it uses less digits than its factorization.

1161323252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290330817 (or 290330815 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 1161323252 is about 34078.1932032788. The cubic root of 1161323252 is about 1051.1169525986.

Adding to 1161323252 its reverse (2523231611), we get a palindrome (3684554863).

The spelling of 1161323252 in words is "one billion, one hundred sixty-one million, three hundred twenty-three thousand, two hundred fifty-two".