1299811229 has 6 divisors (see below), whose sum is σ = 1303360926. Its totient is φ = 1296271160.

The previous prime is 1299811207. The next prime is 1299811231. The reversal of 1299811229 is 9221189921.

It can be written as a sum of positive squares in only one way, i.e., 1296144004 + 3667225 = 36002^2 + 1915^2 .

It is not a de Polignac number, because 1299811229 - 2²⁸ = 1031375773 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 1299811229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299811529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142259 + ... + 151119.

It is an arithmetic number, because the mean of its divisors is an integer number (217226821).

Almost surely, 2^1299811229 is an apocalyptic number.

It is an amenable number.

1299811229 is a deficient number, since it is larger than the sum of its proper divisors (3549697).

1299811229 is an frugal number, since it uses more digits than its factorization.

1299811229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9627 (or 9244 counting only the distinct ones).

The product of its digits is 46656, while the sum is 44.

The square root of 1299811229 is about 36052.8948768334. The cubic root of 1299811229 is about 1091.3400540101.

The spelling of 1299811229 in words is "one billion, two hundred ninety-nine million, eight hundred eleven thousand, two hundred twenty-nine".