1298338921 has 8 divisors (see below), whose sum is σ = 1425751488. Its totient is φ = 1172490000.

The previous prime is 1298338897. The next prime is 1298338939.

1298338921 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 1298338921 - 2⁹ = 1298338409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1298338421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389170 + ... + 392491.

It is an arithmetic number, because the mean of its divisors is an integer number (178218936).

Almost surely, 2^1298338921 is an apocalyptic number.

1298338921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1298338921 is a deficient number, since it is larger than the sum of its proper divisors (127412567).

1298338921 is a wasteful number, since it uses less digits than its factorization.

1298338921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781823.

The product of its digits is 186624, while the sum is 46.

The square root of 1298338921 is about 36032.4703704867. The cubic root of 1298338921 is about 1090.9278413972.

The spelling of 1298338921 in words is "one billion, two hundred ninety-eight million, three hundred thirty-eight thousand, nine hundred twenty-one".