1145545212 has 48 divisors (see below), whose sum is σ = 3057626880. Its totient is φ = 326994432.

The previous prime is 1145545189. The next prime is 1145545217. The reversal of 1145545212 is 2125455411.

It is a super-2 number, since 2×1145545212² = 2624547665472249888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1145545212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145545217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93964 + ... + 105452.

It is an arithmetic number, because the mean of its divisors is an integer number (63700560).

Almost surely, 2^1145545212 is an apocalyptic number.

1145545212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1145545212 is an abundant number, since it is smaller than the sum of its proper divisors (1912081668).

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

1145545212 is a wasteful number, since it uses less digits than its factorization.

1145545212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12690 (or 12688 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The square root of 1145545212 is about 33845.9039176087. The cubic root of 1145545212 is about 1046.3349808858.

The spelling of 1145545212 in words is "one billion, one hundred forty-five million, five hundred forty-five thousand, two hundred twelve".