1229132871 has 12 divisors (see below), whose sum is σ = 1775718672. Its totient is φ = 819281376.

The previous prime is 1229132851. The next prime is 1229132873. The reversal of 1229132871 is 1782319221.

It is not a de Polignac number, because 1229132871 - 2¹¹ = 1229130823 is a prime.

It is a super-2 number, since 2×1229132871² = 3021535229145405282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229132873) 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, 92190 + ... + 104676.

It is an arithmetic number, because the mean of its divisors is an integer number (147976556).

Almost surely, 2^1229132871 is an apocalyptic number.

1229132871 is a deficient number, since it is larger than the sum of its proper divisors (546585801).

1229132871 is a wasteful number, since it uses less digits than its factorization.

1229132871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23430 (or 23427 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1229132871 is about 35058.9913003783. The cubic root of 1229132871 is about 1071.1894278994.

The spelling of 1229132871 in words is "one billion, two hundred twenty-nine million, one hundred thirty-two thousand, eight hundred seventy-one".