1145632212 has 18 divisors (see below), whose sum is σ = 2895903738. Its totient is φ = 381877392.

The previous prime is 1145632171. The next prime is 1145632217. The reversal of 1145632212 is 2122365411.

1145632212 is a `hidden beast` number, since 1 + 1 + 4 + 5 + 632 + 21 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 784784196 + 360848016 = 28014^2 + 18996^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145632217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15911523 + ... + 15911594.

It is an arithmetic number, because the mean of its divisors is an integer number (160883541).

Almost surely, 2^1145632212 is an apocalyptic number.

1145632212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1145632212 is an abundant number, since it is smaller than the sum of its proper divisors (1750271526).

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

1145632212 is a wasteful number, since it uses less digits than its factorization.

1145632212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31823127 (or 31823122 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1145632212 is about 33847.1891299706. The cubic root of 1145632212 is about 1046.3614686630.

Adding to 1145632212 its reverse (2122365411), we get a palindrome (3267997623).

The spelling of 1145632212 in words is "one billion, one hundred forty-five million, six hundred thirty-two thousand, two hundred twelve".