1298845613 has 12 divisors (see below), whose sum is σ = 1432988820. Its totient is φ = 1176304896.

The previous prime is 1298845609. The next prime is 1298845621. The reversal of 1298845613 is 3165488921.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 326777929 + 972067684 = 18077^2 + 31178^2 .

It is not a de Polignac number, because 1298845613 - 2² = 1298845609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298845633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63548 + ... + 81461.

It is an arithmetic number, because the mean of its divisors is an integer number (119415735).

Almost surely, 2^1298845613 is an apocalyptic number.

1298845613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1298845613 is a deficient number, since it is larger than the sum of its proper divisors (134143207).

1298845613 is a wasteful number, since it uses less digits than its factorization.

1298845613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145088 (or 145075 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The square root of 1298845613 is about 36039.5007318359. The cubic root of 1298845613 is about 1091.0697387372.

The spelling of 1298845613 in words is "one billion, two hundred ninety-eight million, eight hundred forty-five thousand, six hundred thirteen".