1291930029 has 12 divisors (see below), whose sum is σ = 2009669116. Its totient is φ = 795033792.

The previous prime is 1291930009. The next prime is 1291930037. The reversal of 1291930029 is 9200391921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78801129 + 1213128900 = 8877^2 + 34830^2 .

It is not a de Polignac number, because 1291930029 - 2⁷ = 1291929901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1291929975 and 1291930002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291930009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5520952 + ... + 5521185.

Almost surely, 2^1291930029 is an apocalyptic number.

It is an amenable number.

1291930029 is a deficient number, since it is larger than the sum of its proper divisors (717739087).

1291930029 is a wasteful number, since it uses less digits than its factorization.

1291930029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11042156 (or 11042153 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 1291930029 is about 35943.4281753981. The cubic root of 1291930029 is about 1089.1298582581.

The spelling of 1291930029 in words is "one billion, two hundred ninety-one million, nine hundred thirty thousand, twenty-nine".