1298139359 has 4 divisors (see below), whose sum is σ = 1416152040. Its totient is φ = 1180126680.

The previous prime is 1298139319. The next prime is 1298139361. The reversal of 1298139359 is 9539318921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1298139359 - 2⁸ = 1298139103 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 (1298139319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59006324 + ... + 59006345.

It is an arithmetic number, because the mean of its divisors is an integer number (354038010).

Almost surely, 2^1298139359 is an apocalyptic number.

1298139359 is a deficient number, since it is larger than the sum of its proper divisors (118012681).

1298139359 is a wasteful number, since it uses less digits than its factorization.

1298139359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118012680.

The product of its digits is 524880, while the sum is 50.

The square root of 1298139359 is about 36029.7010673139. The cubic root of 1298139359 is about 1090.8719446167.

The spelling of 1298139359 in words is "one billion, two hundred ninety-eight million, one hundred thirty-nine thousand, three hundred fifty-nine".