1129857117 has 8 divisors (see below), whose sum is σ = 1507309824. Its totient is φ = 752821248.

The previous prime is 1129857107. The next prime is 1129857119. The reversal of 1129857117 is 7117589211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1129857117 - 2¹⁹ = 1129332829 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129857119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97828 + ... + 108765.

It is an arithmetic number, because the mean of its divisors is an integer number (188413728).

Almost surely, 2^1129857117 is an apocalyptic number.

It is an amenable number.

1129857117 is a deficient number, since it is larger than the sum of its proper divisors (377452707).

1129857117 is a wasteful number, since it uses less digits than its factorization.

1129857117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208419.

The product of its digits is 35280, while the sum is 42.

The square root of 1129857117 is about 33613.3473043076. The cubic root of 1129857117 is about 1041.5365345305.

It can be divided in two parts, 11 and 29857117, that added together give a triangular number (29857128 = T₇₇₂₇).

The spelling of 1129857117 in words is "one billion, one hundred twenty-nine million, eight hundred fifty-seven thousand, one hundred seventeen".