1298864654249 has 4 divisors (see below), whose sum is σ = 1301357677140. Its totient is φ = 1296371631360.

The previous prime is 1298864654201. The next prime is 1298864654251. The reversal of 1298864654249 is 9424564688921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112305414400 + 1186559239849 = 335120^2 + 1089293^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298864654249 - 2⁸ = 1298864653993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1298866654249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1246510664 + ... + 1246511705.

It is an arithmetic number, because the mean of its divisors is an integer number (325339419285).

Almost surely, 2^{1298864654249} is an apocalyptic number.

It is an amenable number.

1298864654249 is a deficient number, since it is larger than the sum of its proper divisors (2493022891).

1298864654249 is an equidigital number, since it uses as much as digits as its factorization.

1298864654249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493022890.

The product of its digits is 238878720, while the sum is 68.

The spelling of 1298864654249 in words is "one trillion, two hundred ninety-eight billion, eight hundred sixty-four million, six hundred fifty-four thousand, two hundred forty-nine".