1145549205 has 12 divisors (see below), whose sum is σ = 1985618700. Its totient is φ = 610959552.

The previous prime is 1145549203. The next prime is 1145549219. The reversal of 1145549205 is 5029455411.

1145549205 is a `hidden beast` number, since 1 + 14 + 554 + 92 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 903964356 + 241584849 = 30066^2 + 15543^2 .

It is not a de Polignac number, because 1145549205 - 2¹ = 1145549203 is a prime.

It is a super-2 number, since 2×1145549205² = 2624565962152264050, 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 1145549205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145549203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12728280 + ... + 12728369.

It is an arithmetic number, because the mean of its divisors is an integer number (165468225).

Almost surely, 2^1145549205 is an apocalyptic number.

1145549205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145549205 is a deficient number, since it is larger than the sum of its proper divisors (840069495).

1145549205 is a wasteful number, since it uses less digits than its factorization.

1145549205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25456660 (or 25456657 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 1145549205 is about 33845.9629054929. The cubic root of 1145549205 is about 1046.3361966128.

The spelling of 1145549205 in words is "one billion, one hundred forty-five million, five hundred forty-nine thousand, two hundred five".