1298223139 has 8 divisors (see below), whose sum is σ = 1408116528. Its totient is φ = 1192055040.

The previous prime is 1298223137. The next prime is 1298223151. The reversal of 1298223139 is 9313228921.

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

It is a cyclic number.

It is not a de Polignac number, because 1298223139 - 2¹ = 1298223137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1298223131) 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, 930597 + ... + 931990.

It is an arithmetic number, because the mean of its divisors is an integer number (176014566).

Almost surely, 2^1298223139 is an apocalyptic number.

1298223139 is a deficient number, since it is larger than the sum of its proper divisors (109893389).

1298223139 is a wasteful number, since it uses less digits than its factorization.

1298223139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862645.

The product of its digits is 46656, while the sum is 40.

The square root of 1298223139 is about 36030.8637004444. The cubic root of 1298223139 is about 1090.8954118674.

The spelling of 1298223139 in words is "one billion, two hundred ninety-eight million, two hundred twenty-three thousand, one hundred thirty-nine".