1298129684 has 6 divisors (see below), whose sum is σ = 2271726954. Its totient is φ = 649064840.

The previous prime is 1298129653. The next prime is 1298129731. The reversal of 1298129684 is 4869218921.

It can be written as a sum of positive squares in only one way, i.e., 1237632400 + 60497284 = 35180^2 + 7778^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162266207 + ... + 162266214.

It is an arithmetic number, because the mean of its divisors is an integer number (378621159).

Almost surely, 2^1298129684 is an apocalyptic number.

It is an amenable number.

1298129684 is a deficient number, since it is larger than the sum of its proper divisors (973597270).

1298129684 is a wasteful number, since it uses less digits than its factorization.

1298129684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324532425 (or 324532423 counting only the distinct ones).

The product of its digits is 497664, while the sum is 50.

The square root of 1298129684 is about 36029.5668028357. The cubic root of 1298129684 is about 1090.8692345296.

The spelling of 1298129684 in words is "one billion, two hundred ninety-eight million, one hundred twenty-nine thousand, six hundred eighty-four".