1229126139 has 12 divisors (see below), whose sum is σ = 1776646872. Its totient is φ = 818844000.

The previous prime is 1229126083. The next prime is 1229126159. The reversal of 1229126139 is 9316219221.

1229126139 is a `hidden beast` number, since 1 + 2 + 29 + 12 + 613 + 9 = 666.

It is not a de Polignac number, because 1229126139 - 2⁷ = 1229126011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1229126159) 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, 34002 + ... + 60119.

It is an arithmetic number, because the mean of its divisors is an integer number (148053906).

Almost surely, 2^1229126139 is an apocalyptic number.

1229126139 is a deficient number, since it is larger than the sum of its proper divisors (547520733).

1229126139 is a wasteful number, since it uses less digits than its factorization.

1229126139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95578 (or 95575 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 1229126139 is about 35058.8952906392. The cubic root of 1229126139 is about 1071.1874722496.

The spelling of 1229126139 in words is "one billion, two hundred twenty-nine million, one hundred twenty-six thousand, one hundred thirty-nine".