1138859121 has 24 divisors (see below), whose sum is σ = 1665128704. Its totient is φ = 691511040.

The previous prime is 1138859093. The next prime is 1138859129. The reversal of 1138859121 is 1219588311.

It is not a de Polignac number, because 1138859121 - 2¹⁷ = 1138728049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1138859121.

It is not an unprimeable number, because it can be changed into a prime (1138859129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5691 + ... + 48063.

Almost surely, 2^1138859121 is an apocalyptic number.

It is an amenable number.

1138859121 is a deficient number, since it is larger than the sum of its proper divisors (526269583).

1138859121 is a wasteful number, since it uses less digits than its factorization.

1138859121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42441 (or 42424 counting only the distinct ones).

The product of its digits is 17280, while the sum is 39.

The square root of 1138859121 is about 33746.9868432724. The cubic root of 1138859121 is about 1044.2953273729.

The spelling of 1138859121 in words is "one billion, one hundred thirty-eight million, eight hundred fifty-nine thousand, one hundred twenty-one".