1145505212 has 24 divisors (see below), whose sum is σ = 2111949840. Its totient is φ = 542142720.

The previous prime is 1145505187. The next prime is 1145505217. The reversal of 1145505212 is 2125055411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145505217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92762 + ... + 104382.

It is an arithmetic number, because the mean of its divisors is an integer number (87997910).

Almost surely, 2^1145505212 is an apocalyptic number.

It is an amenable number.

1145505212 is a deficient number, since it is larger than the sum of its proper divisors (966444628).

1145505212 is a wasteful number, since it uses less digits than its factorization.

1145505212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12941 (or 12939 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1145505212 is about 33845.3129989959. The cubic root of 1145505212 is about 1046.3228021474.

The spelling of 1145505212 in words is "one billion, one hundred forty-five million, five hundred five thousand, two hundred twelve".