1298729049 has 8 divisors (see below), whose sum is σ = 1733322432. Its totient is φ = 864977520.

The previous prime is 1298729009. The next prime is 1298729053. The reversal of 1298729049 is 9409278921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1298729049 - 2¹⁵ = 1298696281 is a prime.

It is a super-3 number, since 3×1298729049³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1298728992 and 1298729010.

It is not an unprimeable number, because it can be changed into a prime (1298729009) 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 7 ways as a sum of consecutive naturals, for example, 206854 + ... + 213039.

It is an arithmetic number, because the mean of its divisors is an integer number (216665304).

Almost surely, 2^1298729049 is an apocalyptic number.

It is an amenable number.

1298729049 is a deficient number, since it is larger than the sum of its proper divisors (434593383).

1298729049 is a wasteful number, since it uses less digits than its factorization.

1298729049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420927.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 1298729049 is about 36037.8835255346. The cubic root of 1298729049 is about 1091.0370986614.

The spelling of 1298729049 in words is "one billion, two hundred ninety-eight million, seven hundred twenty-nine thousand, forty-nine".