1138545249 has 32 divisors (see below), whose sum is σ = 1610219520. Its totient is φ = 714407232.

The previous prime is 1138545223. The next prime is 1138545263. The reversal of 1138545249 is 9425458311.

It is not a de Polignac number, because 1138545249 - 2¹⁷ = 1138414177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1138545249.

It is not an unprimeable number, because it can be changed into a prime (1138545349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1565724 + ... + 1566450.

It is an arithmetic number, because the mean of its divisors is an integer number (50319360).

Almost surely, 2^1138545249 is an apocalyptic number.

It is an amenable number.

1138545249 is a deficient number, since it is larger than the sum of its proper divisors (471674271).

1138545249 is a wasteful number, since it uses less digits than its factorization.

1138545249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189.

The product of its digits is 172800, while the sum is 42.

The square root of 1138545249 is about 33742.3361520805. The cubic root of 1138545249 is about 1044.1993818858.

The spelling of 1138545249 in words is "one billion, one hundred thirty-eight million, five hundred forty-five thousand, two hundred forty-nine".