1299742929 has 20 divisors (see below), whose sum is σ = 1953522736. Its totient is φ = 861170616.

The previous prime is 1299742891. The next prime is 1299742931. The reversal of 1299742929 is 9292479921.

1299742929 is a `hidden beast` number, since 129 + 97 + 429 + 2 + 9 = 666.

It is not a de Polignac number, because 1299742929 - 2¹¹ = 1299740881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299742529) 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 19 ways as a sum of consecutive naturals, for example, 36019 + ... + 62424.

Almost surely, 2^1299742929 is an apocalyptic number.

It is an amenable number.

1299742929 is a deficient number, since it is larger than the sum of its proper divisors (653779807).

1299742929 is an equidigital number, since it uses as much as digits as its factorization.

1299742929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98618 (or 98609 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 1299742929 is about 36051.9476450302. The cubic root of 1299742929 is about 1091.3209384571.

The spelling of 1299742929 in words is "one billion, two hundred ninety-nine million, seven hundred forty-two thousand, nine hundred twenty-nine".